Cyclacel Limited

United Kingdom

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IPC Class
A61P 35/00 - Antineoplastic agents 26
A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid 15
A61K 31/52 - Purines, e.g. adenine 14
C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms 11
C07D 487/04 - Ortho-condensed systems 11
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NICE Class
05 - Pharmaceutical, veterinary and sanitary products 9
42 - Scientific, technological and industrial services, research and design 4
10 - Medical apparatus and instruments 1
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Pending 7
Registered / In Force 55

1.

PROCESS FOR THE PREPARATION OF PURINE DERIVATIVES EXHIBITING CDK INHIBITORY ACTIVITY

      
Application Number 17758102
Status Pending
Filing Date 2021-01-21
First Publication Date 2023-04-06
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Gill, Chris
  • Hudson, Alex

Abstract

The present invention relates to a process for preparing a compound of formula [I], or a pharmaceutically acceptable salt thereof, said process comprising the steps of: (i) forming a reaction mixture comprising a compound of formula [II] and a compound of formula [III]; (ii) heating said reaction mixture to a temperature of at least about 130° C. to form a compound of formula [I]; (iii) isolating said compound of formula [I] from the mixture and optionally recovering unreacted compound of formula [III]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I]. The present invention relates to a process for preparing a compound of formula [I], or a pharmaceutically acceptable salt thereof, said process comprising the steps of: (i) forming a reaction mixture comprising a compound of formula [II] and a compound of formula [III]; (ii) heating said reaction mixture to a temperature of at least about 130° C. to form a compound of formula [I]; (iii) isolating said compound of formula [I] from the mixture and optionally recovering unreacted compound of formula [III]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I].

IPC Classes  ?

  • C07D 473/34 - Nitrogen atom attached in position 6, e.g. adenine

2.

C CYCLACEL

      
Serial Number 97612985
Status Registered
Filing Date 2022-09-29
Registration Date 2024-01-30
Owner Cyclacel Limited ()
NICE Classes  ?
  • 05 - Pharmaceutical, veterinary and sanitary products
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Pharmaceutical products for the treatment of cancer; pharmaceutical preparations for the treatment of cancer; pharmaceutical substances and preparations for the treatment of cancer, hematological disorders; pharmaceutical substances and preparations for use in oncology, hematology; medical preparations for the treatment of cancer and hematological disorders; medical substances in the nature of pharmaceuticals for the treatment of oncological diseases and preparations for use in oncology; medicinal preparations for the treatment of cancer and hematological disorders; medical substances in the nature of pharmaceuticals for the treatment of cancer and hematological disorders; pharmaceutical preparations for human use for the treatment of cancer and hematological disorders Pharmaceutical development; pharmaceutical products development; development of pharmaceuticals for the treatment of cancer; development of products for the treatment of cancer; development of pharmaceuticals for the treatment of leukemia; development of pharmaceuticals for the treatment of hematological cancers; development of products for the treatment of leukemia; development of products for the treatment of hematological cancers

3.

CYCLACEL

      
Serial Number 97613039
Status Registered
Filing Date 2022-09-29
Registration Date 2024-02-06
Owner Cyclacel Limited ()
NICE Classes  ?
  • 05 - Pharmaceutical, veterinary and sanitary products
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Pharmaceutical products for the treatment of cancer; pharmaceutical preparations for the treatment of cancer; pharmaceutical substances and preparations for the treatment of cancer, hematological disorders; pharmaceutical substances and preparations for use in oncology, hematology; medical preparations for the treatment of cancer and hematological disorders; medical substances in the nature of pharmaceuticals for the treatment of oncological diseases and preparations for use in oncology; medicinal preparations for the treatment of cancer and hematological disorders; medical substances in the nature of pharmaceuticals for the treatment of cancer and hematological disorders; pharmaceutical preparations for human use for the treatment of cancer and hematological disorders Research services and laboratory research services in the nature of pharmaceutical development, pharmaceutical products development, development of pharmaceuticals for the treatment of cancer, development of products for the treatment of cancer, development of pharmaceuticals for the treatment of leukemia, development of pharmaceuticals for the treatment of hematological cancers, development of products for the treatment of leukemia, and development of products for the treatment of hematological cancers

4.

PROCESS FOR THE PREPARATION OF A PYRIMIDINO-DIAZEPINE DERIVATIVE

      
Application Number 17634693
Status Pending
Filing Date 2020-08-14
First Publication Date 2022-09-15
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Czyzewski, Michal
  • Atherton, Chris
  • Gill, Chris
  • Hudson, Alex

Abstract

In one aspect, the invention relates to a process for preparing a compound of formula (XII), wherein PG is a protecting group, or a compound of formula (XI), comprising the steps of: (i) treating a compound of formula XIII, wherein PG is a protecting group, with N-methylpiperazine to form a compound of formula XII, wherein said compound of formula XII is in the form of a mixture of cis and trans isomers; (ii) combining the mixture formed in step (i) with an organic solvent and heating the solvent mixture so formed; (iii) isolating the trans-isomer of the compound of formula XII from the solvent mixture formed in step (ii); and (iv) optionally treating said trans-isomer of the compound of formula XII with an acid to form a compound of formula XI; and isolating said compound of formula XI. Further aspects of the invention relate to processes for preparing pyrimido-diazepinone derivatives using the above process and intermediates. In one aspect, the invention relates to a process for preparing a compound of formula (XII), wherein PG is a protecting group, or a compound of formula (XI), comprising the steps of: (i) treating a compound of formula XIII, wherein PG is a protecting group, with N-methylpiperazine to form a compound of formula XII, wherein said compound of formula XII is in the form of a mixture of cis and trans isomers; (ii) combining the mixture formed in step (i) with an organic solvent and heating the solvent mixture so formed; (iii) isolating the trans-isomer of the compound of formula XII from the solvent mixture formed in step (ii); and (iv) optionally treating said trans-isomer of the compound of formula XII with an acid to form a compound of formula XI; and isolating said compound of formula XI. Further aspects of the invention relate to processes for preparing pyrimido-diazepinone derivatives using the above process and intermediates.

IPC Classes  ?

5.

CRYSTALLINE FORMS OF PYRIMIDINO DIAZEPINE DERIVATIVE

      
Application Number 17634717
Status Pending
Filing Date 2020-08-14
First Publication Date 2022-09-08
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Northen, Julian
  • Atherton, Chris
  • Mykytiuk, John

Abstract

The present invention relates to new crystalline forms of a pyrimido-diazepine derivative which exhibits excellent anti-tumour activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

6.

PROCESS FOR THE PREPARATION OF PURINE DERIVATIVES EXHIBITING CDK INHIBITORY ACTIVITY

      
Application Number GB2021050134
Publication Number 2021/148793
Status In Force
Filing Date 2021-01-21
Publication Date 2021-07-29
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Gill, Chris
  • Hudson, Alex

Abstract

The present invention relates to a process for preparing a compound of formula [I], or a pharmaceutically acceptable salt thereof, said process comprising the steps of: (i) forming a reaction mixture comprising a compound of formula [II] and a compound of formula [III]; (ii) heating said reaction mixture to a temperature of at least about 130°C to form a compound of formula [I]; (iii) isolating said compound of formula [I] from the mixture and optionally recovering unreacted compound of formula [III]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1and R2are each independently H, alkyl or haloalkyl; R3and R4are each independently H, alkyl, haloalkyl or aryl; R5is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and where one of X, Y and Z is N and the remainder are CR9;R7, R8and each R9are independently H, alkyl or haloalkyl, wherein at least one of R7, R8and R9 is other than H. Further aspects of the invention relate to a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I].

IPC Classes  ?

  • C07D 473/34 - Nitrogen atom attached in position 6, e.g. adenine
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms

7.

DOSING REGIMEN

      
Application Number GB2020052667
Publication Number 2021/079129
Status In Force
Filing Date 2020-10-22
Publication Date 2021-04-29
Owner CYCLACEL LIMITED (United Kingdom)
Inventor Chiao, Judy

Abstract

The present invention provides a method of treating acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) in a subject, said method comprising administering to a subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) venetoclax; in accordance with a dosing regimen comprising at least one treatment cycle, wherein said treatment cycle comprises: (a) (i) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 consecutive days per week, for 2 weeks, followed by a rest period of at least 1 week, or until treatment-related toxicities are resolved, whichever is longer; or (ii) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 5 consecutive days followed by a rest period of at least 2 weeks, or until treatment-related toxicities are resolved, whichever is longer; and (b) administering a therapeutically effective amount of venetoclax for about 7 to about 14 consecutive days, followed by a rest period of at least 1 week, or until treatment-related toxicities are resolved, whichever is longer.

IPC Classes  ?

  • A61K 31/635 - Compounds containing para-N-benzene- sulfonyl-N-groups, e.g. sulfanilamide, p-nitrobenzenesulfonohydrazide having a heterocyclic ring, e.g. sulfadiazine
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61P 35/02 - Antineoplastic agents specific for leukemia

8.

CRYSTALLINE FORMS OF PYRIMIDINO DIAZEPINE DERIVATIVE

      
Application Number GB2020051952
Publication Number 2021/032959
Status In Force
Filing Date 2020-08-14
Publication Date 2021-02-25
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Northen, Julian
  • Atherton, Chris
  • Mykytiuk, John

Abstract

The present invention relates to new crystalline forms of a pyrimido-diazepine derivative which exhibits excellent anti-tumour activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

  • A61P 35/00 - Antineoplastic agents
  • C07D 487/04 - Ortho-condensed systems
  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

9.

PROCESS FOR THE PREPARATION OF A PYRIMIDINO-DIAZEPINE DERIVATIVE

      
Application Number GB2020051950
Publication Number 2021/032958
Status In Force
Filing Date 2020-08-14
Publication Date 2021-02-25
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Czyzewski, Michal
  • Atherton, Chris
  • Gill, Chris
  • Hudson, Alex

Abstract

In one aspect, the invention relates to a process for preparing a compound of formula (XII), wherein PG is a protecting group, or a compound of formula (XI), comprising the steps of: (i) treating a compound of formula XIII, wherein PG is a protecting group, with N- methylpiperazine to form a compound of formula XII, wherein said compound of formula XII is in the form of a mixture of cis and trans isomers; (ii) combining the mixture formed in step (i) with an organic solvent and heating the solvent mixture so formed; (iii) isolating the trans-isomer of the compound of formula XII from the solvent mixture formed in step (ii); and (iv) optionally treating said trans-isomer of the compound of formula XII with an acid to form a compound of formula XI; and isolating said compound of formula XI. Further aspects of the invention relate to processes for preparing pyrimido-diazepinone derivatives using the above process and intermediates.

IPC Classes  ?

  • A61P 35/00 - Antineoplastic agents
  • C07D 295/073 - Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by halogen atoms or nitro radicals with the ring nitrogen atoms and the substituents separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
  • C07D 487/04 - Ortho-condensed systems
  • C07D 487/10 - Spiro-condensed systems
  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

10.

Process for preparing purine derivatives

      
Application Number 16480858
Grant Number 10927113
Status In Force
Filing Date 2018-01-25
First Publication Date 2019-12-26
Grant Date 2021-02-23
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Skead, Benjamin Mark
  • Westwood, Robert
  • Londesbrough, Derek
  • Northen, Julian Scott
  • Atherton, Jonathan Charles Christian

Abstract

9 is other than H. Further aspects of the invention relate to a highly diastereoselective process for the preparation of compounds of formula [III], a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I], and to a process for preparing the crystalline tartrate salt and free base of compounds of formula [I].

IPC Classes  ?

  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • C07D 473/40 - Heterocyclic compounds containing purine ring systems with halogen atoms or perhalogeno-alkyl radicals directly attached in position 2 or 6

11.

DOSING REGIMEN

      
Application Number GB2018053116
Publication Number 2019/081951
Status In Force
Filing Date 2018-10-26
Publication Date 2019-05-02
Owner CYCLACEL LIMITED (United Kingdom)
Inventor Chiao, Judy

Abstract

A first aspect of the invention relates to a method of treating AML in a subject, wherein said subject: (I) has a white blood cell (WBC) count of less than about 10,000 cells/microliter and/or (II) has a cytogenetic risk classification according to the US Southwest Oncology Group (SWOG) that is not unfavourable, and/or (III) falls within a classification selected from antecedent myelodysplastic syndrome (MDS), antecedent myeloproliferative neoplasm (MPN), and antecedent myelodysplastic/myeloproliferative neoplasm (MDS/MPN); said method comprising administering to the subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) decitabine; in accordance with a dosing regimen comprising at least one first treatment cycle and at least one second treatment cycle, wherein said first treatment cycle comprises administering a therapeutically effective amount of decitabine for 5 to 10 consecutive days followed by a rest period of from 3 to 5 weeks, or until treatment-related toxicities are resolved, whichever is longer; and wherein said second treatment cycle comprises administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 consecutive days per week, for 2 weeks followed by a rest period of from 2 to 4 weeks, or until treatment- related toxicities are resolved, whichever is longer.

IPC Classes  ?

  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61K 9/00 - Medicinal preparations characterised by special physical form
  • A61P 35/00 - Antineoplastic agents
  • A61P 35/02 - Antineoplastic agents specific for leukemia

12.

SAPADUR

      
Application Number 1432238
Status Registered
Filing Date 2018-08-28
Registration Date 2018-08-28
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ? 05 - Pharmaceutical, veterinary and sanitary products

Goods & Services

Pharmaceutical substances and preparations for the treatment of cancer, haematological disorders; pharmaceutical substances and preparations for use in oncology, haematology; medical preparations, medical substances and preparations; medicinal preparations, medical substances and preparations for human use; reagents and substances for medical purposes; reagents and substances for human medical purposes.

13.

SAPAREX

      
Application Number 1431597
Status Registered
Filing Date 2018-08-28
Registration Date 2018-08-28
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ? 05 - Pharmaceutical, veterinary and sanitary products

Goods & Services

Pharmaceutical substances and preparations for the treatment of cancer, haematological disorders; pharmaceutical substances and preparations for use in oncology, haematology; medical preparations, medical substances and preparations; medicinal preparations, medical substances and preparations for human use; reagents and substances for medical purposes; reagents and substances for human medical purposes.

14.

SAPAREX

      
Serial Number 79244342
Status Registered
Filing Date 2018-08-28
Registration Date 2019-07-30
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ? 05 - Pharmaceutical, veterinary and sanitary products

Goods & Services

Pharmaceutical substances and preparations for the treatment of cancer, haematological disorders; pharmaceutical substances and preparations for use in oncology, haematology; medical preparations for the treatment of cancer and haematological disorders, medical substances in the nature of pharmaceuticals for the treatment of oncological diseases and preparations for use in oncology; medicinal preparations for the treatment of cancer and haematological disorders, medical substances in the nature of pharmaceuticals for the treatment of cancer and haematological disorders and preparations for human use for the treatment of cancer and haematological disorders; reagents and diagnostic substances for medical purposes; reagents and diagnostic substances for human medical purposes

15.

SAPADUR

      
Serial Number 79244591
Status Registered
Filing Date 2018-08-28
Registration Date 2019-07-30
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ? 05 - Pharmaceutical, veterinary and sanitary products

Goods & Services

Pharmaceutical substances and preparations for the treatment of cancer, haematological disorders; pharmaceutical substances and preparations for use in oncology, haematology; medical preparations for the treatment of cancer and haematological disorders, medical substances in the nature of pharmaceuticals for the treatment of oncological diseases and preparations for use in oncology; medicinal preparations for the treatment of cancer and haematological disorders, medical substances in the nature of pharmaceuticals for the treatment of cancer and haematological disorders and preparations for human use for the treatment of cancer and haematological disorders; reagents and diagnostic substances for medical purposes; reagents and diagnostic substances for human medical purposes

16.

PROCESS FOR PREPARING PURINE DERIVATIVES

      
Application Number GB2018050208
Publication Number 2018/138500
Status In Force
Filing Date 2018-01-25
Publication Date 2018-08-02
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Ben
  • Westwood, Robert
  • Londesbrough, Derek
  • Northern, Julian
  • Atherton, Chris

Abstract

The present invention relates to a process for preparing a compound of formula [I], said process comprising the steps of: formula [II]+formula [III]−>formula [I] (i) forming a reaction mixture comprising (a) a compound of formula [II], (b) a compound of formula [III] and (c) 1,2-propanediol or polyethylene glycol, or a mixture thereof, and optionally (d) a base; (ii) heating said reaction mixture to a temperature of at least about 150°C to form a compound of formula [I]; (iii) isolating said compound of formula [I]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and formula (A) where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a highly diastereoselective process for the preparation of compounds of formula [III], a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I], and to a process for preparing the crystalline tartrate salt and free base of compounds of formula [I].

IPC Classes  ?

  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • A61P 35/00 - Antineoplastic agents
  • A61K 31/52 - Purines, e.g. adenine

17.

DOSING REGIMEN FOR SAPACITABIN AND SELICICLIB

      
Application Number GB2017051597
Publication Number 2017/208019
Status In Force
Filing Date 2017-06-02
Publication Date 2017-12-07
Owner CYCLACEL LIMITED (United Kingdom)
Inventor Chiao, Judy

Abstract

A first aspect of the invention relates to a method of treating a proliferative disorder in a subject, said method comprising administering to the subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) seliciclib; in accordance with a dosing regimen comprising at least one treatment cycle, wherein said treatment cycle comprises: (a) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, on 3 to 5 consecutive days in a first period; and (b) administering a therapeutically effective amount of seliciclib on 2 to 4 consecutive days; (c) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, on 3 to 5 consecutive days in a second period; and (d) a rest period of at least about 10 days, or until treatment-related toxicities are resolved, whichever is longer. Further aspects of the invention relate to a kit of parts, and corresponding uses.

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents

18.

Pyrimidine derivatives as protein kinase inhibitors

      
Application Number 14820711
Grant Number 09493471
Status In Force
Filing Date 2015-08-07
First Publication Date 2015-12-03
Grant Date 2016-11-15
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Hollick, Jonathan James
  • Jones, Stuart Donald
  • Flynn, Claire June
  • Thomas, Michael George

Abstract

The present invention relates to pyrimidine derivatives capable of inhibiting one or more protein kinases. Further aspects relate to pharmaceutical compositions comprising the pyrimidine derivatives and the use thereof in the treatment of proliferative disorders.

IPC Classes  ?

  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
  • C07D 487/04 - Ortho-condensed systems
  • C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
  • C07D 487/10 - Spiro-condensed systems
  • C07D 453/02 - Heterocyclic compounds containing quinuclidine or iso-quinuclidine ring systems, e.g. quinine alkaloids containing not further condensed quinuclidine ring systems

19.

Dosage regimen for sapacitabine and seliciclib

      
Application Number 14401357
Grant Number 09872874
Status In Force
Filing Date 2013-05-14
First Publication Date 2015-06-18
Grant Date 2018-01-23
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Chiao, Judy H.
  • Blake, David
  • Zheleva, Daniella
  • Davis, Susan
  • Green, Simon
  • Shapiro, Geoffrey

Abstract

A first aspect of the invention relates to a method of treating a proliferative disorder in a subject, said method comprising administering to the subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) seliciclib; in accordance with a dosing regimen comprising at least one first treatment cycle and at least one second treatment cycle, wherein said first treatment cycle comprises: (a) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 to 5 consecutive days for 2 weeks, starting on day d, where d is the first day of treatment with sapacitabine, or the metabolite thereof, in said first treatment cycle; and (b) optionally administering a therapeutically effective amount of seliciclib for 3 to 5 consecutive days for 2 weeks, starting on day (d−1) relative to the administration of sapacitabine or the metabolite thereof, in said first treatment cycle; followed by a rest period of at least 2 weeks, or until treatment-related toxicities are resolved, whichever is longer; and wherein said second treatment cycle comprises: (a) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 to 5 consecutive days for 2 weeks, starting on day d, where d is the first day of treatment with sapacitabine, or the metabolite thereof, in said second treatment cycle; and (b) administering a therapeutically effective amount of seliciclib for 3 to 5 consecutive days for 2 weeks, starting on day (d−1) relative to the administration of sapacitabine or the metabolite thereof, in said second treatment cycle; followed by a rest period of at least 2 weeks, or until treatment-related toxicities are resolved, whichever is longer. Further aspects of the invention relate to a kit of parts, and corresponding uses.

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 31/52 - Purines, e.g. adenine
  • A61K 9/00 - Medicinal preparations characterised by special physical form

20.

Crystalline forms of a purine derivative

      
Application Number 14524686
Grant Number 09573951
Status In Force
Filing Date 2014-10-27
First Publication Date 2015-05-28
Grant Date 2017-02-21
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Skead, Benjamin Mark
  • Worrall, Christopher Peter
  • Atherton, Jonathan Charles Christian
  • Northen, Julian Scott
  • Fernandes, Philippe

Abstract

The present invention relates to new crystalline forms of a purine derivative which exhibits excellent anti-tumor activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

  • C07D 473/00 - Heterocyclic compounds containing purine ring systems
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • G01F 1/115 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
  • G01P 3/48 - Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
  • G01P 5/07 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes with electrical coupling to the indicating device
  • A61K 31/52 - Purines, e.g. adenine
  • C07C 51/41 - Preparation of salts of carboxylic acids by conversion of the acids or their salts into salts with the same carboxylic acid part
  • C07C 57/145 - Maleic acid
  • C07C 57/15 - Fumaric acid
  • C07C 59/245 - Saturated compounds having more than one carboxyl group containing hydroxy or O-metal groups
  • C07C 59/255 - Tartaric acid
  • C07C 59/265 - Citric acid
  • C07C 65/05 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups monocyclic and having all hydroxy or O-metal groups bound to the ring o-Hydroxy carboxylic acids
  • C07C 303/32 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
  • C07C 309/04 - Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing only one sulfo group
  • C07C 309/29 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings

21.

Dosing regimens for treatment of proliferative disorders comprising administration of sapacitabine

      
Application Number 13967901
Grant Number 09675631
Status In Force
Filing Date 2013-08-15
First Publication Date 2014-05-22
Grant Date 2017-06-13
Owner Cyclacel Limited (United Kingdom)
Inventor Chiao, Judy H.

Abstract

One aspect of the present invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating a proliferative disorder, wherein the sapacitabine or metabolite thereof is administered in a dosing regimen comprising at least one treatment cycle, wherein said treatment cycle comprises administering a therapeutically effective amount of sapacitabine or metabolite thereof for about 2 to about 6 days per week, for 2 weeks out of 3 weeks. Another aspect of the invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating cutaneous T-cell lymphoma (CTCL).

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine

22.

Combinations of sapacitabine or CNDAC with DNA methyltransferase inhibitors such as decitabine and procaine

      
Application Number 13960489
Grant Number 08975239
Status In Force
Filing Date 2013-08-06
First Publication Date 2014-04-10
Grant Date 2015-03-10
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Green, Simon Richard
  • Mackay, Ruth
  • Fleming, Ian Neil

Abstract

A first aspect of the invention relates to a combination comprising a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino-pentofuranosyl)-N4-palmitoyl cytosine, or a metabolite thereof. A second aspect of the invention relates to a pharmaceutical product comprising a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino-pentofuranosyl)-N4-palmitoyl cytosine, or a metabolite thereof, as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method of treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino-pentofuranosyl)-N4-palmitoyl cytosine, or a metabolite thereof, to a subject.

IPC Classes  ?

  • A01N 43/04 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atom with one hetero atom
  • A61K 31/70 - CarbohydratesSugarsDerivatives thereof
  • A61K 31/405 - Indole-alkanecarboxylic acidsDerivatives thereof, e.g. tryptophan, indomethacin
  • A61K 31/245 - Amino benzoic acid types, e.g. procaine, novocaine
  • A61K 31/353 - 3,4-Dihydrobenzopyrans, e.g. chroman, catechin
  • A61K 31/502 - PyridazinesHydrogenated pyridazines ortho- or peri-condensed with carbocyclic ring systems, e.g. cinnoline, phthalazine
  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca

23.

Dosage regimen for sapacitabine and decitabine in combination for treating acute myeloid leukemia

      
Application Number 14111430
Grant Number 10226478
Status In Force
Filing Date 2012-04-13
First Publication Date 2014-04-03
Grant Date 2019-03-12
Owner Cyclacel Limited (United Kingdom)
Inventor Chiao, Judy H.

Abstract

A first aspect of the invention relates to a method of treating AML in a subject, said method comprising administering to a subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) decitabine; in accordance with a dosing regimen comprising at least one first treatment cycle and at least one second treatment cycle, wherein said first treatment cycle comprises administering a therapeutically effective amount of decitabine for 5 to 10 consecutive days followed by a rest period of from 3 to 5 weeks, or until treatment-related toxicities are resolved, whichever is longer; and wherein said second treatment cycle comprises administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 consecutive days per week, for 2 weeks followed by a rest period of from 2 to 4 weeks, or until treatment-related toxicities are resolved, whichever is longer.

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom

24.

Pyrimidine derivatives as protein kinase inhibitors

      
Application Number 13910349
Grant Number 09133199
Status In Force
Filing Date 2013-06-05
First Publication Date 2014-03-06
Grant Date 2015-09-15
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Hollick, Jonathan James
  • Jones, Stuart Donald
  • Flynn, Claire June
  • Thomas, Michael George

Abstract

8 are each independently H or alkyl. Further aspects relate to pharmaceutical compositions comprising said compounds and use therefore in the treatment of proliferative disorders and the like.

IPC Classes  ?

  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
  • C07D 487/04 - Ortho-condensed systems
  • C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
  • C07D 453/02 - Heterocyclic compounds containing quinuclidine or iso-quinuclidine ring systems, e.g. quinine alkaloids containing not further condensed quinuclidine ring systems

25.

DOSAGE REGIMEN FOR SAPACITABINE AND SELICICLIB

      
Application Number GB2013051236
Publication Number 2013/171473
Status In Force
Filing Date 2013-05-14
Publication Date 2013-11-21
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Chiao, Judy
  • Blake, David
  • Zheleva, Daniella
  • Davis, Susan
  • Green, Simon
  • Shapiro, Geoffrey

Abstract

A first aspect of the invention relates to a method of treating a proliferative disorder in a subject, said method comprising administering to the subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) seliciclib; in accordance with a dosing regimen comprising at least one first treatment cycle and at least one second treatment cycle, wherein said first treatment cycle comprises: (a) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 to 5 consecutive days for 2 weeks, starting on day d, where d is the first day of treatment with sapacitabine, or the metabolite thereof, in said first treatment cycle; and (b) optionally administering a therapeutically effective amount of seliciclib for 3 to 5 consecutive days for 2 weeks, starting on day (d-1) relative to the administration of sapacitabine or the metabolite thereof, in said first treatment cycle; followed by a rest period of at least 2 weeks, or until treatment-related toxicities are resolved, whichever is longer; and wherein said second treatment cycle comprises: (a) administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 to 5 consecutive days for 2 weeks, starting on day d, where d is the first day of treatment with sapacitabine, or the metabolite thereof, in said second treatment cycle; and (b) administering a therapeutically effective amount of seliciclib for 3 to 5 consecutive days for 2 weeks, starting on day (d-1) relative to the administration of sapacitabine or the metabolite thereof, in said second treatment cycle; followed by a rest period of at least 2 weeks, or until treatment-related toxicities are resolved, whichever is longer. Further aspects of the invention relate to a kit of parts, and corresponding uses.

IPC Classes  ?

  • A61K 31/52 - Purines, e.g. adenine
  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K 31/505 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim
  • A61P 35/00 - Antineoplastic agents

26.

TREATMENT OF PROLIFERATIVE DISEASES WITH PYRIMIDODIAZEPINONES

      
Application Number GB2013050816
Publication Number 2013/144632
Status In Force
Filing Date 2013-03-28
Publication Date 2013-10-03
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Davis, Susan
  • Zheleva, Daniella

Abstract

A first aspect of the invention relates to a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in treating a proliferative disorder, wherein: X is NR7; R1 and R2 are each independently H, alkyl or cycloalkyl; R3 is a 6-membered heterocycloalkyi group selected from piperidinyl, piperazinyl, morpholinyl and tetrahydropyranyl, wherein said heterocycloalkyi group is optionally further substituted by one or more (CH2)nR19 groups; R4 and R4' are each independently H or alkyl; or R4 and R4' together form a spiro cycloalkyl group; Q is CH or N; R6 is OR8 or halogen; n is 1, 2 or 3; R19 is H, alkyl, aryl or a cycloalkyl group; R7 and R8 are each independently H or alkyl; and wherein said compound is administered in accordance with a dosing regimen which: (i) maintains a plasma concentration of from about 50 to about 500 nM for a period of up to about 16 hours; or (ii) maintains a plasma concentration of from about 0.5 μΜ to about 1 μΜ for a period of up to about 6 hours; or (iii) achieves a maximum plasma concentration (Cmax) of no more than about 500 nM within a period of about 6 hours; or (iv) achieves a maximum plasma concentration (Cmax) of no more than about 200 nM within a period of about 16 hours; or (v) achieves a maximum plasma concentration (Cmax) of about 0.5 μΜ to about 1 μΜ within about 6 hours. Further claims relate to a method of treatment based on this dosing regimen, and kits relating to the same.

IPC Classes  ?

  • A61K 9/00 - Medicinal preparations characterised by special physical form
  • A61K 31/5513 - 1,4-Benzodiazepines, e.g. diazepam
  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

27.

Crystalline forms of a purine derivative

      
Application Number 13574488
Grant Number 08889861
Status In Force
Filing Date 2011-01-24
First Publication Date 2013-03-21
Grant Date 2014-11-18
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Skead, Benjamin Mark
  • Worrall, Christopher Peter
  • Atherton, Jonathan Charles Christian
  • Northen, Julian Scott
  • Fernades, Philippe

Abstract

The present invention relates to new crystalline forms of a purine derivative which exhibits excellent anti-tumour activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

  • C07D 473/00 - Heterocyclic compounds containing purine ring systems
  • C07C 59/265 - Citric acid
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • G01P 5/07 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes with electrical coupling to the indicating device
  • C07C 65/05 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups monocyclic and having all hydroxy or O-metal groups bound to the ring o-Hydroxy carboxylic acids
  • G01F 1/115 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
  • C07C 309/04 - Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing only one sulfo group
  • C07C 59/255 - Tartaric acid
  • C07C 51/41 - Preparation of salts of carboxylic acids by conversion of the acids or their salts into salts with the same carboxylic acid part
  • C07C 309/29 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings
  • C07C 59/245 - Saturated compounds having more than one carboxyl group containing hydroxy or O-metal groups
  • C07C 303/32 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
  • C07C 57/145 - Maleic acid
  • G01P 3/48 - Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
  • C07C 57/15 - Fumaric acid
  • A61K 31/52 - Purines, e.g. adenine

28.

DOSAGE REGIMEN FOR SAPACITABINE AND DECITABINE IN COMBINATION FOR TREATING ACUTE MYELOID LEUKEMIA

      
Application Number GB2012050815
Publication Number 2012/140436
Status In Force
Filing Date 2012-04-13
Publication Date 2012-10-18
Owner CYCLACEL LIMITED (United Kingdom)
Inventor Chiao, Judy

Abstract

A first aspect of the invention relates to a method of treating AML in a subject, said method comprising administering to a subject a therapeutically effective amount of (i) sapacitabine, or a metabolite thereof; and (ii) decitabine; in accordance with a dosing regimen comprising at least one first treatment cycle and at least one second treatment cycle, wherein said first treatment cycle comprises administering a therapeutically effective amount of decitabine for 5 to 10 consecutive days followed by a rest period of from 3 to 5 weeks, or until treatment-related toxicities are resolved, whichever is longer; and wherein said second treatment cycle comprises administering a therapeutically effective amount of sapacitabine, or a metabolite thereof, for 3 consecutive days per week, for 2 weeks followed by a rest period of from 2 to 4 weeks, or until treatment- related toxicities are resolved, whichever is longer.

IPC Classes  ?

  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61P 35/02 - Antineoplastic agents specific for leukemia

29.

Preparation of intermediates useful in the synthesis of 2′-cyano-2′-deoxy-N4-palmi-toyl-1-β-D-arabinofuranosylcytosine

      
Application Number 12991582
Grant Number 08884001
Status In Force
Filing Date 2009-05-08
First Publication Date 2011-09-15
Grant Date 2014-11-11
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Wood, Gavin
  • Westwood, Robert
  • Murofushi, Tsuyoshi
  • Numagami, Eiji
  • Takita, Takashi

Abstract

4-palmitoyl-1-β-D-arabmofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.

IPC Classes  ?

30.

CRYSTALLINE FORMS OF A PURINE DERIVATIVE

      
Application Number GB2011000087
Publication Number 2011/089401
Status In Force
Filing Date 2011-01-24
Publication Date 2011-07-28
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin, Mark
  • Worrall, Christopher Peter
  • Atherton, Jonathan, Charles, Christian
  • Northen, Julian, Scott
  • Fernandes, Philippe

Abstract

The present invention relates to new crystalline forms of a purine derivative which exhibits excellent anti-tumour activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents

31.

Pyrimidine derivatives as protein kinase inhibitors

      
Application Number 12680353
Grant Number 08563542
Status In Force
Filing Date 2008-09-29
First Publication Date 2011-02-24
Grant Date 2013-10-22
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Hollick, Jonathan James
  • Jones, Stuart Donald
  • Flynn, Claire June
  • Thomas, Michael George

Abstract

8 are each independently H or alkyl. Further aspects relate to pharmaceutical compositions comprising said compounds and use therefore in the treatment of proliferative disorders and the like.

IPC Classes  ?

  • C07D 487/04 - Ortho-condensed systems
  • C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

32.

Dosing regimens for treatment of proliferative disorders comprising administration of sapacitabine

      
Application Number 12597293
Grant Number 08536188
Status In Force
Filing Date 2008-04-24
First Publication Date 2010-05-20
Grant Date 2013-09-17
Owner Cyclacel Limited (United Kingdom)
Inventor Chiao, Judy H.

Abstract

One aspect of the present invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating a proliferative disorder, wherein the sapacitabine or metabolite thereof is administered in a dosing regimen comprising at least one treatment cycle, wherein said treatment cycle comprises administering a therapeutically effective amount of sapacitabine or metabolite thereof for about 2 to about 6 days per week, for 2 weeks out of 3 weeks. Another aspect of the invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating cutaneous T-cell lymphoma (CTCL).

IPC Classes  ?

33.

Trisubstituted purine derivatives

      
Application Number 12573337
Grant Number 08592581
Status In Force
Filing Date 2009-10-05
First Publication Date 2010-04-15
Grant Date 2013-11-26
Owner
  • Cyclacel Limited (United Kingdom)
  • Cancer Research Technology Limited (United Kingdom)
Inventor
  • Sheldrake, Peter William
  • Atrash, Butrus
  • Green, Simon
  • Mcdonald, Edward
  • Frame, Sheelagh

Abstract

The present invention relates to compounds of formula (I) 6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and 9 is other than H. A further aspect of the invention relates to pharmaceutical compositions comprising compounds of formula (I), and the use of said compounds in treating proliferative disorders, viral disorders, stroke, alopecia, CNS disorders, neurodegenerative disorders, or diabetes.

IPC Classes  ?

  • A61K 31/52 - Purines, e.g. adenine
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms

34.

Combination comprising CNDAC (2′-cyano-2′-deoxy-N4-palmitoyl-1-beta-D-arabinofuranosyl-cytosine) and a cytotoxic agent

      
Application Number 12517196
Grant Number 08349792
Status In Force
Filing Date 2007-12-19
First Publication Date 2010-03-18
Grant Date 2013-01-08
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Green, Simon R.
  • Fleming, Ian Neil

Abstract

4-palmitoyl-1-β-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, in the preparation of a medicament for treating cutaneous T-cell lymphoma (CTCL).

IPC Classes  ?

  • A61K 38/00 - Medicinal preparations containing peptides
  • A61K 31/70 - CarbohydratesSugarsDerivatives thereof
  • A61K 31/44 - Non-condensed pyridinesHydrogenated derivatives thereof
  • A61K 31/19 - Carboxylic acids, e.g. valproic acid
  • A01N 43/04 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atom with one hetero atom
  • A01N 43/42 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
  • A01N 37/00 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
  • A01N 37/28 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N, e.g. carboxylic acid amides or imidesThio-analogues thereof containing the group Thio-analogues thereof

35.

Pyrimidin-4-yl-3, 4-dihydro-2H-pyrrolo [1,2A] pyrazin-1-one compounds

      
Application Number 12083534
Grant Number 08404692
Status In Force
Filing Date 2006-10-09
First Publication Date 2010-02-11
Grant Date 2013-03-26
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Jones, Stuart
  • Westwood, Robert
  • Thomas, Mark
  • Mclachlan, Janice
  • Duncan, Kenneth
  • Scaerou, Fred
  • Zheleva, Daniella I.

Abstract

3, alkyl and alkoxy, wherein said alkyl and alkoxy groups may be further substituted by one or more OH groups. Further aspects of the invention relate to pharmaceutical compositions comprising compounds of formula I, and the use of compounds of formula (I) in the preparation of a medicament for treating a variety of disorders, including proliferative disorders, viral disorders, stroke, etc.

IPC Classes  ?

36.

COMBINATIONS OF SAPACITABINE OR CNDAC WITH DNA METHYLTRANSFERASE INHIBITORS SUCH AS DECITABINE AND PROCAINE

      
Application Number GB2009001418
Publication Number 2009/150405
Status In Force
Filing Date 2009-06-05
Publication Date 2009-12-17
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon, Richard
  • Mackay, Ruth
  • Fleming, Ian, Neil

Abstract

A first aspect of the invention relates to a combination comprising a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino-pentofuranosyl)-N4- palmitoyl cytosine, or a metabolite thereof. A second aspect of the invention relates to a pharmaceutical product comprising a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino- pentofuranosyl)-N4-palmitoyl cytosine, or a metabolite thereof, as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method of treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering a DNA methyltransferase inhibitor and 1-(2-C-cyano-2-dioxy-β-D-arabino- pentofuranosyl)-N4-palmitoyl cytosine, or a metabolite thereof, to a subject.

IPC Classes  ?

  • A61K 31/245 - Amino benzoic acid types, e.g. procaine, novocaine
  • A61K 31/353 - 3,4-Dihydrobenzopyrans, e.g. chroman, catechin
  • A61K 31/502 - PyridazinesHydrogenated pyridazines ortho- or peri-condensed with carbocyclic ring systems, e.g. cinnoline, phthalazine
  • A61K 31/706 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61P 35/00 - Antineoplastic agents

37.

INTERMEDIATE AND PROCESSES INVOLVED IN THE PREPARATION OF 2 ' -CYANO-2 ' -DE0XY-N4-PALMIT0YL-1-BETA-ARABIN0FURAN0SYLCYTOSINE

      
Application Number GB2009001141
Publication Number 2009/136162
Status In Force
Filing Date 2009-05-08
Publication Date 2009-11-12
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Wood, Gavin, Jeffrey
  • Westwood, Robert

Abstract

The present invention relates to a process for preparing a compound of formula (682-6'), said process comprising the steps of: formula (682-4), (682-5), (682-6'): (i) converting a compound of formula (682-4) into a compound of formula (682-5); and (ii) converting said compound of formula (682-5) into a compound of formula (682- 6'). Further aspects of the invention relate to the use of the above process in the preparation of 2'-cyano-2'-deoxy-N4-palmitoyl-l-β-D-arabinofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • C07F 7/08 - Compounds having one or more C—Si linkages
  • C07H 19/06 - Pyrimidine radicals
  • A61P 35/00 - Antineoplastic agents

38.

PREPARATION OF INTERMEDIATES USEFUL IN THE SYNTHEIS OF 2'-CYANO-2'-DEOXY-N4-PALMITOYL-1-BETA-D-ARABINOFURANOSYLCYTOSINE

      
Application Number GB2009001134
Publication Number 2009/136158
Status In Force
Filing Date 2009-05-08
Publication Date 2009-11-12
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Wood, Gavin, Jeffrey
  • Westwood, Robert

Abstract

The present invention relates to a process for preparing a compound of formula 682-4, said process comprising the steps of: (i) converting a compound of formula 682-1 into a compound of formula 682-2'; (ii) converting said compound of formula 682-2' into a compound of formula 682-3; and (iii) converting said compound of formula 682-3 into a compound of formula 682-4. Further aspects of the invention relate to the use of the above process in the preparation of 2'-cyano-2'-deoxy-N4 -palmitoyl-1-β-D-arabmofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • C07F 7/08 - Compounds having one or more C—Si linkages
  • C07H 19/06 - Pyrimidine radicals
  • A61P 35/00 - Antineoplastic agents

39.

SAPAMAX

      
Application Number 1014111
Status Registered
Filing Date 2009-08-24
Registration Date 2009-08-24
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ? 05 - Pharmaceutical, veterinary and sanitary products

Goods & Services

Pharmaceutical preparations and biopharmaceuticals for the treatment of cancer.

40.

PYRIMIDINE DERIVATIVES AS PROTEIN KINASE INHIBITORS

      
Application Number GB2008003305
Publication Number 2009/040556
Status In Force
Filing Date 2008-09-29
Publication Date 2009-04-02
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Hollick, Jonathan, James
  • Jones, Stuart, Donald
  • Flynn, Claire, June
  • Thomas, Micheal, George

Abstract

The present invention relates to a compound of formula (VII)I, or a pharmaceutically acceptable salt or ester thereof, wherein: X is NR7; Y is O or N-(CH2)nR19; n is 1, 2 or 3; m is 1 or 2; R1 and R2 are each independently H, alkyl or cycloalkyl; R4 and R4' are each independently H or alkyl; or R4 and R4' together form a spiro cycloalkyl group; R19 is H, alkyl, aryl or a cycloalkyl group; R6 is OR8 or halogen; and R7 and R8 are each independently H or alkyl. Further aspects relate to pharmaceutical compositions comprising said compounds and use therefore in the treatment of proliferative disorders and the like.

IPC Classes  ?

  • C07D 487/04 - Ortho-condensed systems
  • C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
  • A61P 35/00 - Antineoplastic agents
  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

41.

Crystalline pyrimidine nucleoside derivative suspensions in capsules

      
Application Number 12097912
Grant Number 08497291
Status In Force
Filing Date 2006-12-22
First Publication Date 2009-03-19
Grant Date 2013-07-30
Owner Cyclacel Limited (United Kingdom)
Inventor
  • Westwood, Robert
  • Selkirk, Alistair

Abstract

4-palmitoyl-1-β-D-arabinofuranosylcytosine and a liquid carrier.

IPC Classes  ?

  • A01N 43/80 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms, as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
  • A61K 31/42 - Oxazoles
  • A61K 9/64 - Organic coatings containing proteins or derivatives thereof

42.

USE OF SAPACITABINE TO TREAT PROLIFERATIVE DISEASE

      
Application Number GB2008001424
Publication Number 2008/132443
Status In Force
Filing Date 2008-04-24
Publication Date 2008-11-06
Owner CYCLACEL LIMITED (United Kingdom)
Inventor Chiao, Judy

Abstract

One aspect of the present invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating a proliferative disorder, wherein the sapacitabine or metabolite thereof is administered in a dosing regimen comprising at least one treatment cycle, wherein said treatment cycle comprises administering a therapeutically effective amount of sapacitabine or metabolite thereof for about 2 to about 6 days per week, for 2 weeks out of 3 weeks. Another aspect of the invention relates to the use of sapacitabine, or a metabolite thereof, in the preparation of a medicament for treating cutaneous T-cell lymphoma (CTCL).

IPC Classes  ?

  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
  • A61P 35/00 - Antineoplastic agents

43.

2, 6, 9-SUBSTITUTED PURINE DERIVATIVES HAVING ANTI PROLIFERATIVE PROPERTIES

      
Application Number GB2008001173
Publication Number 2008/122767
Status In Force
Filing Date 2008-04-02
Publication Date 2008-10-16
Owner
  • CYCLACEL LIMITED (United Kingdom)
  • CANCER RESEARCH TECHNOLOGY LIMITED (United Kingdom)
Inventor
  • Sheldrake, Peter, William
  • Atrash, Butrus
  • Green, Simon
  • Mcdonald, Edward
  • Frame, Sheelagh

Abstract

The present invention relates to compounds of formula (I) wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl or cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and formula (a) where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and each R9 is other than H. A further aspect of the invention relates to pharmaceutical compositions comprising compounds of formula (I), and the use of said compounds in treating proliferative disorders, viral disorders, stroke, alopecia, CNS disorders, neurodegenerative disorders, or diabetes.

IPC Classes  ?

  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents

44.

COMBINATION OF A PURINE-BASED CDK INHIBITOR WITH A TYROSINE KINASE INHIBITOR AND USE THEREOF IN THE TREATMENT OF PROLIFERATIVE DISORDERS

      
Application Number GB2008001189
Publication Number 2008/122779
Status In Force
Filing Date 2008-04-02
Publication Date 2008-10-16
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Frame, Sheelagh
  • Fleming, Ian

Abstract

The present invention relates to combination comprising (i) an ErbB inhibitor; and (ii) a CDK inhibitor, or a pharmaceutically acceptable salt thereof, selected from: (a) roscovitine; (b) 3-{9-isopropyl-6-[(pyridin-3-ylmethyl)-amino]-9H-purin-2-ylamino}- 2-methyl-pentan-2-ol; (c) 3-{9-isopropyl-6-[(pyridm-3-ylmethyl)-amino]-9H-purin-2- ylamino}-pentan-2-ol; and (d) (2R,3S-3-(6-((4,6-dimethylpyridin-3-ylmethylamino)-9- isopropyl-9H-purin-2-ylamino)pentan-2-ol. Further aspects of the invention relate to pharmaceutical products and pharmaceutical compositions comprising combinations according to the invention, and methods of treatment using the same.

IPC Classes  ?

  • A61K 31/52 - Purines, e.g. adenine
  • A61K 31/517 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with carbocyclic ring systems, e.g. quinazoline, perimidine
  • A61K 45/00 - Medicinal preparations containing active ingredients not provided for in groups
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61P 35/00 - Antineoplastic agents

45.

COMBINATION COMPRISING CNDAC (2'-CYANO-2'-DEOXY-N4-PALMITOYL-1-BETA-D-ARABINOFURANOSYL-CYTOSINE) AND A CYTOTOXIC AGENT

      
Application Number GB2007004883
Publication Number 2008/075042
Status In Force
Filing Date 2007-12-19
Publication Date 2008-06-26
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Fleming, Ian

Abstract

A first aspect of the invention relates to a combination comprising 2'-cyano-2'-deoxy- N4-palmitoyl-l-β-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, and a cytotoxic agent selected from: (a) a HDAC inhibitor; and (b) a topoisomerase inhibitor selected from etoposide, topotecan and SN-38, or a prodrug thereof. A second aspect relates to a pharmaceutical product comprising (i) 2'-cyano-2'-deoxy- N4-palmitoyl-l-β-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, and (ii) a cytotoxic agent selected from: (a) a HDAC inhibitor; and (b) a topoisomerase inhibitor selected from etoposide, topotecan and SN-38, or a prodrug thereof, as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect relates to a method of treating a proliferative disorder, said method comprising simultaneously, separately or sequentially administering to a subject 2'- cyano-2'-deoxy-N4-palmitoyl-1-β-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, and a cytotoxic agent selected from: (a) a HDAC inhibitor; and (b) a topoisomerase inhibitor selected from etoposide, topotecan and SN-38, or a prodrug thereof. A fourth aspect of the invention relates to the use of a subject 2'-cyano-2'-deoxy-N4- palmitoyl-1-β-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, in the preparation of a medicament for treating cutaneous T-cell lymphoma (CTCL).

IPC Classes  ?

  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61K 31/7042 - Compounds having saccharide radicals and heterocyclic rings
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61P 35/00 - Antineoplastic agents

46.

COMBINATION OF A 2-SUBSTITUTED-4-HETER0ARYL-PYRIMIDINE AMINE WITH A CYTOTOXIC DRUG AND USE THEREOF IN THE TREATMENT OF A PROLIFERATIVE DISORDER

      
Application Number GB2007001761
Publication Number 2007/132220
Status In Force
Filing Date 2007-05-14
Publication Date 2007-11-22
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Maccallum, David
  • Green, Simon

Abstract

A first aspect of the invention relates to a combination comprising (a) a cytotoxic drug selected from: (i) doxorubicin; (ii) SN-38, or a prodrug thereof; (iii) gemcitabine; and (b) a compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein: R1 is alkyl; R2 and R3 are each independently selected from H and alkyl; and R4 is a heteroalicyclic group optionally substituted by one or more substituents selected from alkyl, CO-alkyl and aralkyl. Further aspects of the invention relate to pharmaceutical products and therapeutic uses of said combination.

IPC Classes  ?

  • A61K 31/4745 - QuinolinesIsoquinolines ortho- or peri-condensed with heterocyclic ring systems condensed with ring systems having nitrogen as a ring hetero atom, e.g. phenanthrolines
  • A61K 31/495 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two nitrogen atoms as the only ring hetero atoms, e.g. piperazine
  • A61K 31/506 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
  • A61K 31/5375 - 1,4-Oxazines, e.g. morpholine
  • A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
  • A61K 31/704 - Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin attached to a condensed carbocyclic ring system, e.g. sennosides, thiocolchicosides, escin, daunorubicin, digitoxin
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61P 35/00 - Antineoplastic agents

47.

COMBINED ANTICANCER PYRIMIDINE-THIAZOLE AURORA KINASE INHIBITORS

      
Application Number GB2007001763
Publication Number 2007/132221
Status In Force
Filing Date 2007-05-14
Publication Date 2007-11-22
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Maccallum, David
  • Green, Simon

Abstract

A first aspect of the invention relates to a combination comprising (a) a cytotoxic drug selected from (i) cisplatin; and (ii) 5-FU, or a prodrug thereof; and (b) a compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein: R1 is alkyl; R2 and R3 are each independently selected from H and alkyl; and R4 is a heteroalicyclic group optionally substituted by one or more substituents selected from alkyl, CO-alkyl and aralkyl. Further aspects of the invention relate to pharmaceutical products comprising the combination of the invention, and methods of treating proliferative disorders using the same.

IPC Classes  ?

  • A61K 31/282 - Platinum compounds
  • A61K 31/506 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
  • A61K 33/24 - Heavy metalsCompounds thereof
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca

48.

COMBINATION OF CNDAC WITH A 2-SUBSTITUTED-4-HETER0ARYL-PYRIMIDINE AMINE AND USE THEREOF IN THE TREATMENT OF A PROLIFERATIVE DISORDER

      
Application Number GB2007001780
Publication Number 2007/132228
Status In Force
Filing Date 2007-05-14
Publication Date 2007-11-22
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Maccallum, David
  • Green, Simon

Abstract

A first aspect of the invention relates to a combination comprising CNDAC, or a prodrug thereof, and a compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein: R1 is alkyl; R2 and R3 are each independently selected from H and alkyl; and R4 is a heteroalicyclic group optionally substituted by one or more substituents selected from alkyl, CO-alkyl and aralkyl. A second aspect of the invention relates to a pharmaceutical product comprising a compound of formula (I),, or a pharmaceutically acceptable salt thereof, and CNDAC, or a prodrug thereof, as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method of treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering a compound of formula I, or a pharmaceutically acceptable salt thereof, and CNDAC, or a prodrug thereof, to a subject.

IPC Classes  ?

  • A61K 31/495 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two nitrogen atoms as the only ring hetero atoms, e.g. piperazine
  • A61K 31/506 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
  • A61K 31/5375 - 1,4-Oxazines, e.g. morpholine
  • A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61P 35/00 - Antineoplastic agents

49.

PROCESS FOR THE PREPARATION OF 2,6,9-TRISUBSTITUTED PURINES

      
Application Number GB2007001140
Publication Number 2007/110649
Status In Force
Filing Date 2007-03-29
Publication Date 2007-10-04
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Westwood, Robert
  • Wood, Gavin
  • Atherton, Jonathan, Charles, Christian

Abstract

The present invention relates to a process for preparing a compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein R2 is (a) where R3, R4, R7 and R8 are each independently selected from H, alkyl, aryl and aralkyl, said alkyl, aryl and aralkyl groups each being optionally substituted with one or more R12 groups, and wherein at least one of R3, R4, R7 and R8 is other than H; R5 is OH, O-alkyl, NH2, H, alkyl, aryl or aralkyl, said alkyl, aryl and aralkyl groups each being optionally substituted with one or more R12 groups; R6 is NR10R11, wherein R10 and R11 are each independently H or hydrocarbyl; R9 is hydrocarbyl; and each R12 is independently selected from OR13, halo, alkyl, COOR14, CONR15R16, SO2NR17R18, NO2, CN, NR19R20SR21 and CF3, where R13-21 are each independently H, alkyl or aryl; said process comprising the steps of (II) (III) (IV) (i) converting a compound of formula (II) to a compound of formula (III), wherein X is halo and R is aryl, alkyl, cycloalkyl, aralkyl, heteroaryl or alkyl-heteroaryl; (ii) converting said compound of formula (III) to a compound of formula (IV); and (iii) converting said compound of formula (IV) to a compound of formula (I).

IPC Classes  ?

  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms
  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents

50.

MARKERS

      
Application Number GB2006004561
Publication Number 2007/071914
Status In Force
Filing Date 2006-12-06
Publication Date 2007-06-28
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Frame, Sheelagh

Abstract

The present invention relates to pharmacodynamic markers for CDKIs including the candidate 2,6,9-tri-substituted purine known as seliciclib (roscovitine). The identity of these markers facilitates the convenient identification of seliciclib (roscovitine)-like activity both in vitro and in vivo.

IPC Classes  ?

  • G01N 33/68 - Chemical analysis of biological material, e.g. blood, urineTesting involving biospecific ligand binding methodsImmunological testing involving proteins, peptides or amino acids

51.

CRYSTALLINE PYRIMIDINE NUCLEOSIDE DERIVATIVES SUSPENSIONS IN CAPSULES

      
Application Number GB2006004927
Publication Number 2007/072061
Status In Force
Filing Date 2006-12-22
Publication Date 2007-06-28
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Westwood, Robert
  • Selkirk, Alistair

Abstract

The present invention relates to a pharmaceutical formulation which comprises (i) a capsule, and (ii) a core comprising crystalline 2'-cyano-2'-deoxy-N4-palmitoyl-l-&bgr;-D-arabinofuranosylcytosine and a liquid carrier.

IPC Classes  ?

  • A61K 9/48 - Preparations in capsules, e.g. of gelatin, of chocolate

52.

COMBINATION OF ROSCOVITINE AND A HDCA INHIBITOR TO TREAT PROLIFEATIVE DISEASES

      
Application Number GB2006004226
Publication Number 2007/054727
Status In Force
Filing Date 2006-11-13
Publication Date 2007-05-18
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Frame, Sheelagh
  • Fleming, Ian

Abstract

A first aspect of the invention relates to a combination comprising roscovitine, or a pharmaceutically acceptable salt thereof, and a HDAC inhibitor selected from sodium butyrate, or a prodrug thereof, suberoylanilide hydroxamic acid (SAHA), sodium valproate and trichostatin A (TSA). A second aspect of the invention relates to a pharmaceutical product comprising roscovitine, or a pharmaceutically acceptable salt thereof, and a HDAC inhibitor selected from sodium butyrate, or a prodrug thereof, suberoylanilide hydroxamic acid (SAHA), sodium valproate and trichostatin A (TSA) as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method for treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering roscovitine, or a pharmaceutically acceptable salt thereof, and a HDAC inhibitor selected from sodium butyrate, or a prodrug thereof, suberoylanilide hydroxamic acid (SAHA), sodium valproate and trichostatin A (TSA) to a subject.

IPC Classes  ?

53.

ANTIPROLIFERATIVE COMBINATION COMPRISING CYC-682 AND A CYTOTOXIC AGENT

      
Application Number GB2006004230
Publication Number 2007/054731
Status In Force
Filing Date 2006-11-13
Publication Date 2007-05-18
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Fleming, Ian
  • Raymond, Eric

Abstract

A first aspect of the invention relates to a combination comprising 2'-cyano-2'-deoxy-N4-palmitoyl-l-beta-D-arabinofuranosyl-cytosine, or a metabolite thereof, or a pharmaceutically acceptable salt thereof, and a cytotoxic agent selected from (a) a vinca alkaloid; (b) a taxane; (c) a cytosine analogue; (d) an anthracycline; and (e) a platinum antineoplastic agent. A second aspect of the invention relates to a pharmaceutical product comprising the above combination as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method for treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering the above combination.

IPC Classes  ?

  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61K 31/7068 - Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
  • A61P 35/00 - Antineoplastic agents

54.

COMBINATION OF A CDK-INHIBITOR AND A HDAC-INHIBITOR

      
Application Number GB2006004224
Publication Number 2007/054725
Status In Force
Filing Date 2006-11-13
Publication Date 2007-05-18
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Green, Simon
  • Frame, Sheelagh
  • Fleming,ian

Abstract

A first aspect of the invention relates to a combination comprising a HDAC inhibitor and a compound of formula (I) or (II), or a pharmaceutically acceptable salt thereof, and a HDAC inhibitor. A second aspect of the invention relates to a pharmaceutical product comprising a HDAC inhibitor and a compound of formula (I) or (II), or a pharmaceutically acceptable salt thereof, as a combined preparation for simultaneous, sequential or separate use in therapy. A third aspect of the invention relates to a method for treating a proliferative disorder, said method comprising simultaneously, sequentially or separately administering a compound of formula (I) or (II), or a pharmaceutically acceptable salt thereof, and a HDAC inhibitor to a subject.

IPC Classes  ?

  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • A61K 31/4188 - 1,3-Diazoles condensed with heterocyclic ring systems, e.g. biotin, sorbinil
  • A61K 31/427 - Thiazoles not condensed and containing further heterocyclic rings
  • A61K 31/19 - Carboxylic acids, e.g. valproic acid
  • A61K 31/167 - Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide having the nitrogen atom of a carboxamide group directly attached to the aromatic ring, e.g. lidocaine, paracetamol
  • A61P 35/00 - Antineoplastic agents

55.

CYCLACEL

      
Application Number 002127165
Status Registered
Filing Date 2001-03-12
Registration Date 2005-01-17
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ?
  • 05 - Pharmaceutical, veterinary and sanitary products
  • 10 - Medical apparatus and instruments
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Chemical preparations for pharmaceutical and medical purposes; pharmaceutical preparations and substances. Medical and surgical apparatus and instruments; parts and fittings for all the aforesaid goods. Medical services; research services and laboratory research services; compilation of medical, pharmaceutical and scientific information, and provision thereof via electronic media, including the internet, and non-electronic media; leasing of access time to databases.

56.

CYCLACEL

      
Serial Number 75247547
Status Registered
Filing Date 1997-02-25
Registration Date 2002-04-16
Owner Cyclacel Limited (United Kingdom)
NICE Classes  ?
  • 05 - Pharmaceutical, veterinary and sanitary products
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

[ pharmaceutical preparations for the treatment of degenerative diseases ] [ medical services; ] laboratory research in the field of drug discovery, database development and drug candidate optimization; medical research [ ; compiling and providing medical information, pharmaceutical and scientific information; computer services, namely, providing databases featuring medical, pharmaceutical and scientific information ]

57.

PROCESS FOR THE PREPARATION OF PURINE DERIVATIVES EXHIBITING CDK INHIBITORY ACTIVITY

      
Document Number 03161387
Status Pending
Filing Date 2021-01-21
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Gill, Chris
  • Hudson, Alex

Abstract

The present invention relates to a process for preparing a compound of formula [I], or a pharmaceutically acceptable salt thereof, said process comprising the steps of: (i) forming a reaction mixture comprising a compound of formula [II] and a compound of formula [III]; (ii) heating said reaction mixture to a temperature of at least about 130°C to form a compound of formula [I]; (iii) isolating said compound of formula [I] from the mixture and optionally recovering unreacted compound of formula [III]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I].

IPC Classes  ?

  • C07D 473/34 - Nitrogen atom attached in position 6, e.g. adenine

58.

CRYSTALLINE FORMS OF PYRIMIDINO DIAZEPINE DERIVATIVE

      
Document Number 03145286
Status Pending
Filing Date 2020-08-14
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Northen, Julian
  • Atherton, Chris
  • Mykytiuk, John

Abstract

The present invention relates to new crystalline forms of a pyrimido-diazepine derivative which exhibits excellent anti-tumour activity. The invention also relates to a pharmaceutical composition containing said crystalline forms as an active ingredient, and use thereof in the prevention or treatment of disease. The invention further relates to a process for preparing the crystalline forms.

IPC Classes  ?

  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
  • A61P 35/00 - Antineoplastic agents
  • C07C 309/30 - Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton of non-condensed six-membered aromatic rings of six-membered aromatic rings substituted by alkyl groups
  • C07D 487/04 - Ortho-condensed systems

59.

PROCESS FOR THE PREPARATION OF A PYRIMIDINO-DIAZEPINE DERIVATIVE

      
Document Number 03145287
Status Pending
Filing Date 2020-08-14
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Benjamin
  • Londesbrough, Derek
  • Czyzewski, Michal
  • Atherton, Chris
  • Gill, Chris
  • Hudson, Alex

Abstract

In one aspect, the invention relates to a process for preparing a compound of formula (XII), wherein PG is a protecting group, or a compound of formula (XI), comprising the steps of: (i) treating a compound of formula XIII, wherein PG is a protecting group, with N- methylpiperazine to form a compound of formula XII, wherein said compound of formula XII is in the form of a mixture of cis and trans isomers; (ii) combining the mixture formed in step (i) with an organic solvent and heating the solvent mixture so formed; (iii) isolating the trans-isomer of the compound of formula XII from the solvent mixture formed in step (ii); and (iv) optionally treating said trans-isomer of the compound of formula XII with an acid to form a compound of formula XI; and isolating said compound of formula XI. Further aspects of the invention relate to processes for preparing pyrimido-diazepinone derivatives using the above process and intermediates.

IPC Classes  ?

  • A61P 35/00 - Antineoplastic agents
  • C07D 295/135 - Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
  • C07D 487/04 - Ortho-condensed systems

60.

2, 6, 9-SUBSTITUTED PURINE DERIVATIVES HAVING ANTI PROLIFERATIVE PROPERTIES

      
Document Number 02681529
Status In Force
Filing Date 2008-04-02
Grant Date 2015-06-30
Owner
  • CYCLACEL LIMITED (United Kingdom)
  • CANCER RESEARCH TECHNOLOGY LIMITED (United Kingdom)
Inventor
  • Sheldrake, Peter William
  • Atrash, Butrus
  • Green, Simon
  • Mcdonald, Edward
  • Frame, Sheelagh

Abstract

The present invention relates to compounds of formula (I) wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl or cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and formula (a) where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and each R9 is other than H. A further aspect of the invention relates to pharmaceutical compositions comprising compounds of formula (I), and the use of said compounds in treating proliferative disorders, viral disorders, stroke, alopecia, CNS disorders, neurodegenerative disorders, or diabetes.

IPC Classes  ?

  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms

61.

PYRIMIDINE DERIVATIVES AS PROTEIN KINASE INHIBITORS

      
Document Number 02700979
Status In Force
Filing Date 2008-09-29
Grant Date 2017-06-20
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Hollick, Jonathan James
  • Jones, Stuart Donald
  • Flynn, Claire June
  • Thomas, Micheal George

Abstract

The present invention relates to a compound of formula (VII)I, or a pharmaceutically acceptable salt or ester thereof wherein: X is NR7; Y is O or N-(CH2)n R19 ; n is 1, 2 or 3; m is 1 or 2; R1 and R2 are each independently H, alkyl or cycloalkyl; R4 and R4' are each independently H or alkyl; or R4 and R4' together form a spiro cycloalkyl group; R19 is H, alkyl, aryl or a cycloalkyl group; R6 is OR8 or halogen; and R7 and R8 are each independently H or alkyl. Further aspects relate to pharmaceutical compositions comprising said compounds and use therefore in the treatment of proliferative disorders and the like.

IPC Classes  ?

  • A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
  • A61P 35/00 - Antineoplastic agents
  • C07D 487/04 - Ortho-condensed systems
  • C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or

62.

PROCESS FOR PREPARING PURINE DERIVATIVES

      
Document Number 03050061
Status Pending
Filing Date 2018-01-25
Owner CYCLACEL LIMITED (United Kingdom)
Inventor
  • Skead, Ben
  • Westwood, Robert
  • Londesbrough, Derek
  • Northen, Julian
  • Atherton, Chris

Abstract

The present invention relates to a process for preparing a compound of formula [I], said process comprising the steps of: formula [II]+formula [III]->formula [I] (i) forming a reaction mixture comprising (a) a compound of formula [II], (b) a compound of formula [III] and (c) 1,2-propanediol or polyethylene glycol, or a mixture thereof, and optionally (d) a base; (ii) heating said reaction mixture to a temperature of at least about 150°C to form a compound of formula [I]; (iii) isolating said compound of formula [I]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and formula (A) where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a highly diastereoselective process for the preparation of compounds of formula [III], a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I], and to a process for preparing the crystalline tartrate salt and free base of compounds of formula [I].

IPC Classes  ?

  • A61K 31/52 - Purines, e.g. adenine
  • A61P 35/00 - Antineoplastic agents
  • C07D 473/16 - Heterocyclic compounds containing purine ring systems with oxygen, sulfur, or nitrogen atoms directly attached in positions 2 and 6 two nitrogen atoms