C07C 45/45 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by condensation
2.
Efficient and environment friendly process for chloromethylation of substituted benzenes
C07D 317/54 - Radicals substituted by oxygen atoms
C07C 41/14 - Preparation of ethers by exchange of organic parts on the ether-oxygen for other organic parts, e.g. by trans-etherification
C07D 317/52 - Radicals substituted by halogen atoms or nitro radicals
C07C 45/51 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
3.
AN EFFICIENT PROCESS FOR PREPARATION OF ACYL DERIVATIVES OF ALKYLENEDIOXYBENZENES
The present disclosure provides a process of preparation of compounds of Formula I comprising the step of : reacting an alkylenedioxybenzene compound of Formula II with an acyl halide of Formula III in presence of a solvent, wherein the step of reacting the alkylenedioxybenzene compound of Formula II with the acyl halide of Formula III is effected in presence of an amphoteric oxide and a Lewis acid so as to immediately quench the compound of formula H-X, formed during the course of the reaction, to substantially eliminate degradation of the compound of any of Formula I and II. The present disclosure also provides for process(es) for preparation of compound of Formula IVa, IVb and IVc.
C07D 317/08 - Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
C07D 317/46 - Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
C07D 317/54 - Radicals substituted by oxygen atoms
4.
AN EFFICIENT AND ENVIRONMENT FRIENDLY PROCESS FOR CHLOROMETHYLATION OF SUBSTITUTED BENZENES
C07C 41/22 - Preparation of ethers by reactions not forming ether-oxygen bonds by introduction of halogenPreparation of ethers by reactions not forming ether-oxygen bonds by substitution of halogen atoms by other halogen atoms
C07C 43/225 - Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing halogen
C07D 317/52 - Radicals substituted by halogen atoms or nitro radicals
5.
AN IMPROVED AND COMMERCIALLY VIABLE PROCESS FOR PREPARATION OF ARYL KETONES
C07C 45/45 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by condensation
C07C 49/784 - Ketones containing a keto group bound to a six-membered aromatic ring polycyclic with all keto groups bound to a non-condensed ring
C07C 49/825 - Ketones containing a keto group bound to a six-membered aromatic ring containing hydroxy groups all hydroxy groups bound to the ring
C07C 49/84 - Ketones containing a keto group bound to a six-membered aromatic ring containing ether groups, groups, groups, or groups
C07D 317/54 - Radicals substituted by oxygen atoms
6.
A PROCESS FOR PREPARATION OF ALKENYL AND ALKYL DERIVATIVES OF ALKYLENEDIOXYBENZENE
The present disclosure generally relates to the method of preparation of compounds of Formula IV. An aspect of the present disclosure relates to a process for preparation of compound of Formula IV, said process comprising the step of reacting an alkylenedioxybenzene compound of Formula II with an acyl halide of Formula III in presence of a solvent, characterized in that the step of reacting the alkylenedioxybenzene compound of Formula II with the acyl halide of Formula III is effected in the presence of an amphoteric oxide so as to in-situ quench the compound of formula H-X formed during the course of the reaction, thereby substantially eliminating degradation of the compounds of Formula IV and Formula II.
C07D 317/50 - Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
7.
Efficient process for the synthesis of cyclic amides
Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.
The present invention relates to the synthesis of alkoxy substituted benzaldehydes obtained from the corresponding alkoxy substituted benzenes. Alkoxy substituted benzaldehydes are products of broad commercial interest and are used as end products and intermediates in flavor and fragrance applications and pharmaceutical ingredients. For example, 3,4-methylendioxy-benzaldehyde (also known as heliotropin or piperonal) is used widely both as a end product and intermediate for the above mentioned applications. Other examples include 3,4-dimethoxybenzaldehyde, 3,4,5-trimethoxybenzaldehyde and 3,4-ethylenedioxybenzene which are intermediates in the synthesis of active pharmaceutical intermediates.
C07D 317/68 - Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
C07D 317/54 - Radicals substituted by oxygen atoms
C07C 45/56 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds from heterocyclic compounds
9.
AN IMPROVED METHOD FOR THE PREPARATION OF ALKYLENEDIOXYBENZENE COMPOUNDS
This invention relates to an improved method for preparing alkylenedioxybenzene compounds of Formula I, from the corresponding ortho-dihydroxy aromatic compound of Formula II wherein n is 0, 1, 2 or 3; and R1 and R2 independently represent H, linear or branched C1 – C10 alkyl or alkenyl group, cycloalkyl group, halogen selected from C1, Br, I, nitro (-NO2), alkoxy (-OR) or SR thioether (-SR), wherein R is linear or branched alkyl group comprising C1-C6 carbon atoms.
C07D 317/50 - Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
C07D 319/18 - Ethylenedioxybenzenes, not substituted on the hetero ring
C07D 321/10 - Seven-membered rings condensed with carbocyclic rings or ring systems
10.
AN EFFICIENT PROCESS FOR THE SYNTHESIS OF CYCLIC AMIDES
Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.
The present invention relates to the synthesis of alkoxy substituted benzaldehydes obtained from the corresponding alkoxy substituted benzenes. Alkoxy substituted benzaldehydes are products of broad commercial interest and are used as end products and intermediates in flavor and fragrance applications and pharmaceutical ingredients. For example, 3,4-methylendioxybenzaldehyde (also known as heliotropin or piperonal) is used widely both as a end product and intermediate for the above mentioned applications. Other examples include 3,4-dimethoxybenzaldehyde, 3,4,5- trimethoxybenzaldehyde and 3,4-ethylenedioxybenzene which are intermediates in the synthesis of active pharmaceutical intermediates.
C07D 317/68 - Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
C07C 45/56 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds from heterocyclic compounds
patents
