The invention relates to an improved process for preparing indane derivatives including, for example, ramelteon. The invention provides a process for preparing ramelteon from a compound of formula (II), wherein the process comprises successive reduction reactions and converting a compound of formula (IV) to ramelteon: The invention further relates to an improved process for converting a compound of formula (IV) to ramelteon.
C07D 307/77 - Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
2.
METHOD FOR DETERMINING THE ENANTIOMERIC PURITY OF INDANE DERIVATIVES
The invention relates to an improved process for preparing (8iS)-2-(l,6,7,8-tetrahydro- 2H-indeno[5,4-b]furan-8-yl)ethanamine of formula (S)-(III), or a salt or solvate thereof, and to the use thereof for preparing ramelteon. The present invention further relates to ramelteon polymorphic Form I and processes therefor. The present invention further provides a method for differentiating and quantifying the enatiomers, thereby determining the enantiomeric purity, of a compound of formula (III) or ramelteon.
The invention relates to new crystalline polymorphic forms of N-[2- (diethylamino)ethyl]-5-[(Z)-(5-fluoro-l,2-dihydro-2-oxo-3H-indol-3-ylidine)methyl]-2,4- dimethyl-lH-pyrrole-3-carboxamide (i.e., sunitinib base), including Form I, Form II, and Form IV, processes for preparing crystalline polymorphic forms of sunitinib base, and pharmaceutically acceptable salts of new crystalline polymorphic forms of sunitinib base and pharmaceutical compositions comprising new crystalline polymorphic forms of sunitinib base, salts of new crystalline polymorphic forms of sunitinib base and mixtures thereof.
C07D 403/06 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
A61K 31/405 - Indole-alkanecarboxylic acidsDerivatives thereof, e.g. tryptophan, indomethacin
The invention provides an improved process for preparing duloxetine. The invention provides an improved process for preparing duloxetine, efficiently and with good reaction rate, which is carried out in a homogeneous mixture, at a temperature lower than 80 °C, in which chiral integrity is preserved, and neither sodium hydride nor potassium hydroxide is required.
The present invention is related to processes suitable for industrial synthesis of pregabalin from (i?)-(-)-3-(carbamoylmethyl)-5-methylhexanoic using sodium hypochlorite as described herein. In addition, the present invention is related to pregabalin which is substantially free of impurities and pharmaceutical compositions comprising pregabalin.
C07C 227/04 - Formation of amino groups in compounds containing carboxyl groups
C07C 229/08 - Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to hydrogen atoms
A61K 31/195 - Carboxylic acids, e.g. valproic acid having an amino group
A61P 29/00 - Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agentsNon-steroidal antiinflammatory drugs [NSAID]
6.
AN IMPROVED PROCESS FOR PREPARING A 2,4-THIAZOLIDINEDIONE DERIVATIVE
C07D 417/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a chain containing hetero atoms as chain links
A61K 31/4439 - Non-condensed pyridinesHydrogenated derivatives thereof containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. omeprazole
A61P 3/10 - Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
7.
NEW CRYSTALLINE SOLID FORMS OF O-DESVENLAFAXINE BASE
The invention relates generally to crystalline polymorphic forms of O- desmethylvenlafaxine base, designated herein as O-desmethylvenlafaxine base Forms A and B, and methods for preparing and obtaining the same.
C07C 215/64 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with rings other than six-membered aromatic rings being part of the carbon skeleton
A61K 31/135 - Amines, e.g. amantadine having aromatic rings, e.g. methadone
The present invention relates to amorphous form darifenacin hydrobromide and processes therefor. In addition, the present invention relates to compositions comprising amorphous form darifenacin hydrobromide. Formula (I):
C07D 405/06 - Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
9.
METHOD FOR DETERMINING ENANTIOMERIC PURITY OF DARIFENACIN AND INTERMEDIATES
The present invention relates to a method for differentiating and quantifying the enantiomers, thereby determining the enantiomeric purity, of darifenacin and its intermediate compounds and salts thereof. In addition, the invention relates to a method for differentiating and quantifying the enantiomers, thereby determining the enantiomeric purity of compounds of formula (I): wherein Y is hydrogen or a substituent of the formula (II): including the differentiation and quantification of compounds of formula (I) of varying enantiomeric purity from their corresponding enantiomers. The invention further relates to a process for preparing enantiomerically pure darifenacin using enantiomerically pure starting compounds which have been previously differentiated and quantified according to the method of the invention.
C07B 57/00 - Separation of optically-active organic compounds
B01D 15/38 - Selective adsorption, e.g. chromatography characterised by the separation mechanism involving specific interaction not covered by one or more of groups , e.g. affinity, ligand exchange or chiral chromatography
The invention relates to improved methods for preparing polymorph Form I of 2,3- dihydro-5,6-dimethoxy-2-[[ 1 -(phenylmethy l)-4-piperidinyl]methyl- 1H-inden- 1 -one hydrochloride (i.e., donepezil hydrochloride).
C07D 211/32 - Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by doubly bound oxygen or sulfur atoms or by two oxygen or sulfur atoms singly bound to the same carbon atom by oxygen atoms
11.
PROCESS FOR SYNTHESIZING DESVENLAFAXINE FREE BASE AND SALTS OR SALVATES THEREOF
The invention relates to a process for manufacturing desvenlafaxine free base and salts or solvates thereof, comprising O-demethylating venlafaxine by treatment with 2- (diethylamino) ethanethiol free base or its hydrochloride salt.
C07C 213/08 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
C07C 215/64 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with rings other than six-membered aromatic rings being part of the carbon skeleton
The present invention relates to a process for preparing vildagliptin of formula (I) with high chemical and enantiomeric purity and compositions comprising vildagliptin. In addition, the present invention relates to (2S,2'S)-1,1'-[[(3-hydroxytricyclo[3.3.1.13'7]dec-1- y1)imino]bis(1-oxo-2,1-ethanediyl)]di(2-pyrrolidinecarbonitrile) of formula (II), processes for preparing, and compositions comprising a compound for formula (II). Furthermore, the invention relates to processes for determining the purity of vildagliptin using a compound of formula (II).
C07D 403/06 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
The invention relates, in general, to an improved process for preparing lamotrigine, Formule (I). Processes for preparing and purifying lamotrigine, including lamotrigine hydrate, lamotrigine monohydrate and anhydrous lamotrigine, are described.
A61K 31/53 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine
15.
PROCESSES FOR PREPARING CINACALCET HYDROCHLORIDE AND POLYMORPHIC FORMS THEREOF
The invention relates to cinacalcet hydrochloride, new polymorphic crystalline forms of cinacalcet hydrochloride, amorphous cinacalcet hydrochloride and synthetic processes for their preparation.
C07C 209/28 - Preparation of compounds containing amino groups bound to a carbon skeleton by reductive alkylation of ammonia, amines or compounds having groups reducible to amino groups, with carbonyl compounds by reduction with other reducing agents
C07C 211/30 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing at least one six-membered aromatic ring the six-membered aromatic ring being part of a condensed ring system formed by two rings
The invention relates to a process for preparing rimonabant. In particular, the invention relates to minimizing the presence and effects of certain by-products of formula (III) and impurities present in rimonabant occurring during the synthesis of rimonabant.
C07D 231/14 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
17.
NOVEL SOLID FORMS OF RIMONABANT AND SYNTHETIC PROCESSES FOR THEIR PREPARATION
C07D 231/14 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
18.
IMPROVED PROCESSES FOR PREPARING VANLAFAXINE BASE AND SALTS THEREOF
C07C 213/08 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
C07C 217/74 - Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with rings other than six-membered aromatic rings being part of the carbon skeleton
C07C 213/10 - SeparationPurificationStabilisationUse of additives
19.
PROCESSES FOR PREPARING INTERMEDIATE COMPOUNDS USEFUL FOR THE PREPARATION OF CINACALCET
The invention relates, in general, to an improved process for preparing compounds (e.g., 3-(3-trifluoromethylphenyl)propanal (Compound III, below)), which are key intermediates for jjhe synthesis of cinacalcet its salts and/Or solvates thereof, as well as the use of such compounds prepared by such process for the preparation of cinacalcet and/or its salts or solvates.(I).
C07C 29/17 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
C07C 29/44 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by addition reactions, i.e. reactions involving at least one carbon-to-carbon double or triple bond
C07C 45/30 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by oxidation with halogen containing compounds, e.g. hypohalogenation
C07C 33/46 - Halogenated unsaturated alcohols containing only six-membered aromatic rings as cyclic part
C07C 33/48 - Halogenated unsaturated alcohols containing only six-membered aromatic rings as cyclic part with unsaturation outside the aromatic rings
C07C 47/24 - Unsaturated compounds having —CHO groups bound to acyclic carbon atoms containing halogen
20.
IMPROVED METHOD FOR PREPARING 1,3-DISUBSTITUTED PYRROLIDINE COMPOUNDS
A process for preparing substituted pyrrolidine compounds, including (5)-2-{l-[2- (2,3-dihydrobenzofuran-5-yl)ethyl]-3-pyrrolidinyl}-2,2-diphenylacetamide hydrobromide, commonly known in the art as darifenacin, comprising reacting a pyrrolidine compound with a benzofuran derivative in the presence of a phase-transfer catalyst.
C07D 405/06 - Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
21.
IMPROVED PROCESS FOR SYNTHESIZING DESVENLAFAXINE FREE BASE AND SALTS OR SOLVATES THEREOF
C07C 213/02 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
C07C 235/34 - Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton containing six-membered aromatic rings having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
22.
PROCESS FOR PREPARATION OF INTERMEDIATES OF ROSIGLITAZONE, ROSIGLITAZONE AND POLYMORPHIC FORMS THEREOF
The invention relates to a polymorphic form of 5-(4-[2-(N-methyl-N-(2- pyridyl)amino)ethoxy]benzylidene)-2,4-thiazolidinedione (Formula (I)): to a process for its preparation and to the use of such compound for preparing rosiglitazone in the form of a free base or a salt thereof. The invention also relates to a polymorphic form of rosiglitazone in the form of a free base, to a process for its preparation and to the use of such polymorph for preparing a salt of rosiglitazone. The invention also relates to a process of preparing a polymorphic form of a rosiglitazone salt.
C07D 417/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a chain containing hetero atoms as chain links
23.
PROCESSES FOR PREPARING EZETIMIBE AND INTERMEDIATE COMPOUNDS USEFUL FOR THE PREPARATION THEREOF
The invention relates, in general, to an improved process for converting compounds of Formula II (below) to compounds of Formula III (below), which are key intermediates for the synthesis of ezetimibe, or to ezetimibe itself, wherein in Formulas II and III, R represents hydrogen, alkyl, or a hydroxyl protecting group (e.g., benzyl group, a substituted benzyl group, or a silyl group). The invention further includes the use of the described process and the use of compounds of Formula III made by the described process for the preparation of ezetimibe.
C07D 205/08 - Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams
24.
PROCESS FOR THE PREPARATION OF METOPROLOL AND ITS SALTS
C07C 213/02 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
C07C 213/08 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
C07C 217/32 - Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having one amino group and at least two singly-bound oxygen atoms, with at least one being part of an etherified hydroxy group, bound to the carbon skeleton, e.g. ethers of polyhydroxy amines having the oxygen atom of at least one of the etherified hydroxy groups further bound to a carbon atom of a six-membered aromatic ring the six-membered aromatic ring or condensed ring system containing that ring being further substituted
A61K 31/135 - Amines, e.g. amantadine having aromatic rings, e.g. methadone
A61P 9/10 - Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
The invention relates, in general, to an improved process for the preparation of the compounds (3R,4S)-4-(4-(benzyloxy)phenyl)-l-(4-fluorophenyl)-3-[3-(4-fluorophenyl)-3- oxopropyl]azetidin-2-one and (3R,4S)-l-(4-fluorophenyl)-3-[3-(4-fluorophenyl)-3-oxopropyl]- 4-(4-hydroxyphenyl)-azetidin-2-one, which are key intermediates for the synthesis of ezetimibe, as well as the use of these intermediates for the preparation of ezetimibe.
C07D 205/08 - Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams
C07D 263/24 - Oxygen atoms attached in position 2 with hydrocarbon radicals, substituted by oxygen atoms, attached to other ring carbon atoms
27.
PROCESS FOR THE PREPARATION OF TAMSULOSIN AND RELATED COMPOUNDS
The invention relates, in general, to the preparation of (R)(-)tamsulosin free base by reaction of (R)-5-(2-aminopropyl)-2-methoxybenzenesulfonamide or an addition salt thereof with 1 -(2-bromoethoxy)-2-ethoxybenzene in a polar aprotic solvent in the presence of an organic base. More particularly, the invention relates to a process for preparing pure solid crystalline (R)(-)tamsulosin in its free base form as a precursor for the production of (R)(-)tamsulosin hydrochloride.
C07C 303/40 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids by reactions not involving the formation of sulfonamide groups
C07C 311/37 - Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
The invention relates to an improved process for the preparation of duloxetine hydrochloride. More particularly, the invention relates to a process for the enantiomeric enrichment of duloxetine, and to a process for increasing the enantiomeric excess of enantiomerically-enriched duloxetine and salts thereof.
The invention relates to a process for preparing 2- (l-benzylpiperidin-4- ylmethyliden) -5, 6-dimethoxyindan-l-one (a key intermediate in the synthesis of donepezil hydrochloride), crystalline polymorph forms of this key intermediate and their use thereof for producing donepezil hydrochloride. In particular, the invention provides a method for producing the intermediate 2-(l -benzylpiperidin-4-ylmethyliden) -5, 6- dimethoxyindan-1-one. The process includes reacting 5, 6-dimethoxyindan-l-one with l-benzylpiperidine-4-carbaldehyde using potassium hydroxide in an aqueous solvent. The aqueous solvent can be a mixture of an organic solvent and water. Where the organic solvent is not miscible with water, the reaction may be performed in the presence of a phase transfer catalyst.
C07D 211/32 - Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by doubly bound oxygen or sulfur atoms or by two oxygen or sulfur atoms singly bound to the same carbon atom by oxygen atoms
30.
PROCESSES FOR PREPARING TEGASEROD MALEATE AND PHARMACEUTICAL COMPOSITIONS CONTAINING IT
The invention relates to a new process for the production of tegaserod maleate that includes the isolation of tegaserod hydroiodide as an intermediate. In particular, the invention provides an improved process for preparing 3-(5-methoxy-lH-indol-3- ylmethylene)-N-pentylcarbazimidamide hydrogen maleate (i.e., tegaserod maleate). This process includes reacting 5-methoxyindole-3-carbaldehyde with N-pentyl-N'- aminoguanidine hydroiodide and isolating solid 3-(5-methoxy-lH-indol-3-ylmethylene)-N- pentylcarbazimidamide hydroiodide (i.e., tegaserod hydroiodide).
The invention relates to an improved process for preparing duloxetine hydrochloride. More particularly, the invention relates to the preparation of duloxetine hydrochloride by a process that provides a maximum yield of desired product with a minimum amount of undesired by-products.
The invention relates to new polymorphic forms of olopatadine hydrochloride, designated herein as olopatadine hydrochloride Forms A and B, and methods of preparing, purifying and treating them.
The invention relates to an improved process for the preparation of duloxetine hydrochloride. In this process, a phase transfer catalyst is not required.
The invention provides a method for preparing candesartan cilexetil and related tetrazolyl compounds. More particularly, the invention relates to the preparation of candesartan cilexetil and related tetrazolyl compounds and includes a method of removing a protective group (e.g., triphenylmethane (trityl) protecting group) from an N-protected tetrazolyl compound using a Lewis acid in an inert solvent and in the presence of an alcohol (e.g., reacting an N-protected tetrazolyl compound with ZnCl2 in the presence of an alcohol).
C07D 403/10 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a carbon chain containing aromatic rings
A61K 31/4184 - 1,3-Diazoles condensed with carbocyclic rings, e.g. benzimidazoles
A61P 9/00 - Drugs for disorders of the cardiovascular system
35.
PROCESS FOR THE PREPARATION OF ADAPALENE AND RELATED COMPOUNDS
The invention provides an improved process for the preparation of a benzonaphthalene derivative including, in particular, the manufacture of high purity adapalene. The invention further includes a method for assessing the color of adapalene by means of a quantitative colorimetric measurement of the produced adapalene.
C07C 43/21 - Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing rings other than six-membered aromatic rings
C07C 65/26 - 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 ether groups, groups, groups, or groups polycyclic containing rings other than six-membered aromatic rings
Described is a process of preparing a pure solid or crystalline racemic 3,3- diarylpropylamine compound and the compounds formed thereof. The solid and crystalline forms of racemic 3,3-diarylpropylamine compound are especially suitable for producing highly pure 3,3-diarylpropylamine salts such as tolterodine tartrate. Also described are the highly pure solid or crystalline forms of racemic tolterodine, racemic tolterodine salt and tolterodine tartrate.
C07C 213/10 - SeparationPurificationStabilisationUse of additives
C07C 215/54 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups linked by carbon chains having at least three carbon atoms between the amino groups and the six-membered aromatic ring or the condensed ring system containing that ring
The invention relates, in general, to a new solid crystalline form of pantoprazole free acid (denominated 'Form III'), salts derived therefrom (e.g., pantoprazole sodium and pantoprazole sodium sesquihydrate) and methods for producing the same. The invention further includes formulating pantoprazole free acid Form III, salts derived therefrom (e.g., pantoprazole sodium and pantoprazole sodium sesquihydrate) and/or in vivo cleavable prodrugs thereof (collectively 'the compounds of the invention') into readily usable dosage units for the therapeutic treatment (including prophylactic treatment) of mammals, including humans.
C07D 401/12 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
A61K 31/4439 - Non-condensed pyridinesHydrogenated derivatives thereof containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. omeprazole
38.
PROCESS OF MAKING GEMINAL BISPHOSPHONIC ACIDS AND PHARMACEUTICALLY ACCEPTABLE SALTS AND/OR HYDRATES THEREOF
This invention relates to the process of making geminal bisphosphonic acids and pharmaceutically acceptable salts and/or hydrates thereof which have the formula (I): wherein X1, X2, X3, X1 R1 and R2 are described herein.
The invention is directed to overcome the problems associated with the formation of rabeprazole sodium, i.e. formation of (2-(⏧4-(3-methoxypropoxy)-3-methylpyridin-2-yl] methyl}sulfonyl)-1H-benzimidazole side product which is achieved by a process for the preparation of amorphous rabeprazole salt, e.g. sodium, comprising the steps of: i) contacting rabeprazole salt complex, e.g. sodium acetone complex with a first solvent system; ii) filtering the solid from the solvent system used in step i) or distilling, totally or partially, the solvent system used in step i) under reduced or atmospheric pressure, to thereby obtain a residue; iii) contacting the solid or the residue of step ii) with a second solvent system; v) filtering the solid from the solvent system used in step iii) or distilling, totally or partially, the solvent system used in step iii) under reduced or atmospheric pressure to thereby obtain a solid; v) optionally repeating steps iii) and iv) one or more times; vi) optionally filtering to obtain a wet solid; and vii) drying the wet solid.
C07D 401/12 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
The invention relates to the preparation of losartan and losartan potassium. More particularly, the invention relates to the preparation of losartan and losartan potassium in a simplified process that provides higher purity losartan potassium and losartan potassium having larger crystal sizes. The invention further includes formulating into readily usable dosage units for the therapeutic treatment (including prophylactic treatment) of mammals, including humans.
C07D 403/10 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a carbon chain containing aromatic rings
A61K 31/4178 - 1,3-Diazoles not condensed and containing further heterocyclic rings, e.g. pilocarpine, nitrofurantoin
The present invention relates to a process for preparing racemic narwedine (which can be can be kinetically resolved to yield (-)-narwedine and which is the biogenic precursor of (-)- galanthamine) and the use thereof as a starting material for producing (-)-galanthamine. The invention further includes processes for preparing (-)-galanthamine and (-)-galanthamine hydrobromide, as well as related novel compounds.
The invention relates to polymorphic crystalline forms of aripiprazole, synthetic processes for their preparation and pharmaceutical compositions containing the same. These crystalline forms of aripiprazole can be readily milled and can be easily combined with various pharmaceutical adjuvants without effecting changes to their crystalline structure when, for example, pressed into tablet or capsule form.
The invention includes an improved process for producing tamsulosin comprising reacting 5-(2-aminopropyl)-2-methoxybenzenesulfonamide with 2-(o-ethoxyphenoxy)ethyl bromide in an organic phosphite solvent to obtain tamsulosin. Optically pure (R)- 5-(2-aminopropyl)-2- methoxybenzenesulfonamide can be employed to produce optically pure (R)-tamsulosin product. The organic phosphite solvent utilized in the reaction can include tri-alkyl phosphites such as triethyl phosphite, trimethyl phosphite, and tributyl phosphite. Additionally, processes for producing tamsulosin having a low concentration of by-product contaminants, such as 5-((R)-2- Bis-⏧2-(2-ethoxyphenoxy)ethyl]amino}-propyl)-2-methoxybenzenesulfonamide, and the use of such by-products to monitor the chemical purity of tamsulosin, are provided.
C07C 303/40 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids by reactions not involving the formation of sulfonamide groups
C07C 311/37 - Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
C07B 57/00 - Separation of optically-active organic compounds
44.
PROCESS FOR PREPARING QUETIAPINE AND QUETIAPINE FUMARATE
The invention comprises a process for preparing quetiapine and/or its salts, including, quetiapine fumarate. The process generally comprises reacting dibenzothiazepinone (dibenzo⏧bf]⏧l,4]thiazepin-l l(10H)-one) with phosphorous oxychloride in the presence of triethylamine in an aromatic organic solvent such as toluene or, preferably, xylene at reflux temperature to obtain an aromatic hydrocarbon solution of 11-chloro-dibenzo ⏧bf] ⏧1,4] thiazepine. Thereafter, the l l-chloro-dibenzo⏧bf]⏧1,4] thiazepine is reacted with 2-(2-piperazin-l-ylethoxy)-ethanol to yield, following several processing steps, quetiapine.. Compound I can then be further reacted with fumaric acid at elevated temperature to yield quetiapine fumarate. The resulting quetiapine fumarate obtained is suitable for use in pharmaceutical preparations.
A61K 31/554 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one sulfur as ring hetero atoms, e.g. clothiapine, diltiazem
patents