Abstract: The present invention is related to a novel process for the preparation of amisulpride (I) which involves: methylation of 4-amino-salicylic-acid (VI) with dimethyl sulphate and base, optionally in presence of TBAB to obtain 4-amino-2-methoxy methyl benzoate (VII) and (ii) oxidation of 4-amino-2-methoxy-5-ethyl thio benzoic acid (IX) or 4-amino-2-methoxy-5-ethyl thio methyl benzoate (X) with oxidizing agent in the presence of sodium tungstate or ammonium molybdate to give 2-methoxy-4-amino-5-ethyl-sulfonyl benzoic acid (IV) or 2-methoxy-4-amino-5-ethyl-sulfonyl methyl benzoate (XI) respectively.

Abstract: A process for preparation of optically pure or optically enriched enantiomers of sulphoxide compounds of formula (I), such as omeprazole and structurally related compounds, as well as their salts and hydrates.

Abstract: A process for the polymerization of allylamine and its subsequent crosslinking in the presence of a dispersing agent.

Abstract: The present invention relates to a novel crystalline form L of (±)-desvenlafaxine benzoate and process for the preparing of the same. Further, the present invention also relates to pharmaceutical composition of novel crystalline form L of desvenlafaxine benzoate and one or more pharmaceutically acceptable excipient.

Abstract: Novel method for synthesis of optically pure (S)-(?)-1,1?-bi-2-naphthol and/or (R)-(+)-1,1?-bi-2-naphthol via resolution of racemic (RS)-1,1?-bi-2-naphthol through formation of co-crystal with optically active derivatives of ?-amino acids.

Abstract: The present invention provides a novel process for preparation of darunavir that involves reduction of [(1S,2R)-3-[[(4-nitrophenyl)sulfonyl](2-methylpropyl)amino]-2-hydroxy -1-(phenylmethyl)propyl]carbamic acid (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl ester, of formula (5). The present invention also provides darunavir ethanolate of particle size wherein d0.9 is less than 130 ?m, d0.5 is less than 30 ?m, d0.1 is less than 10 ?m and process for its preparation.

Abstract: An improved process for synthesis of duloxetine hydrochloride (1) having chiral purity greater than 99.9% that is characterized by the following: (i) preparation of racemic condensed compound (RS)—N,N-di methyl-3-(1-naphthyloxy)-3-(2-thienyl)propanamine (4) by reaction of racemic hydroxy compound (2) with 1-fluoronaphthalene (3) in presence of a base such as sodamide, potassium amide or potassium bis(trimethylsilyl)amide (KHDMS) in polar aprotic solvent, (ii) optical resolution of racemic condensed compound (5a+5b) with di-benzoyl-L-tartaric acid (7, DBTA, R=H) or di-para-anisoyl-L-tartaric acid (7, DATA, R=OCH3) to obtain crude (S)—N.N-dimethyl-3-(1-naphthyloxy)-3-(2-thienyl)propanamine dibenzoyl tartarate salt (8a) or (S)—N.

Abstract: An improved process for Efavirenz, which has several advantages over reported methods like low cost, high yield, better optical purity and industrial feasibility.

Abstract: The disclosure herein relates to a new Lamivudine polymorphic form, methods of making the same, and pharmaceutical formulations thereof. A (?) cis-4-amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-(1H)-pyrimidin-2-one in the form of monoclinic crystals has characteristic powder X-ray diffractogram, as disclosed herein, is disclosed along with a process for preparation of the same. A pharmaceutical composition in solid dosage unit form comprising a therapeutically effective amount of a new Lamivudine polymorphic form in combination with a pharmaceutically acceptable carrier is also disclosed along with a pharmaceutical composition useful for treating HIV infections in humans.

Abstract: The process of the present invention relates to a method for the synthesis of a 1,4-diphenylazetidinone of formula (VIII) by using novel oxime intermediates.

Abstract: A process for synthesis of 4S-phenyl-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one comprising resolution of 4S-phenyl-3-[(5RS)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one by selective esterification of 4S-phenyl-3-[(5R)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one using appropriate esterification reagent in an organic solvent in presence of Lipase enzyme at a temperature ranging from 0° to 100° C., and further isolation.

Abstract: A polymorph of emtricitabine, wherein said polymorph displays angular positions of characteristic peaks in powder X-ray diffraction pattern 13.61±0.2, 15.54±0.2, 19.49±0.2, 20.55±0.2, 25.89±0.2, 28.09±0.2 and 29.10±0.2. A pharmaceutical composition comprising a polymorph of emtricitabine displaying angular positions of characteristic peaks in powder X-ray diffraction pattern 13.61±0.2, 15.54±0.2, 19.49±0.2, 20.55±0.2, 25.89±0.2, 28.09±0.2 and 29.10±0.2. A process for the preparation of a polymorph of emtricitabine comprising the steps of (a) dissolving crude emtricitabine in polar organic solvent by heating at a temperature of at least 40° C. and not more than 150° C. to form a reaction mixture optionally decreasing the concentration of polar organic solvent in said reaction mixture; cooling the reaction mixture obtained in step (a); and separating the solid from the cooled reaction mixture resulted in step (b).

Abstract: An improved process for the manufacture of Lamivudine. The process involves: (a) resolution of racemic lamivudine (intermediate of formula IX) to cis (±) lamivudine of formula (XII) by forming a crystalline salt and separating the product from an organic solvent by fractional crystallization; (b) resolution of cis (±) lamivudine to cis (?) isomer involving formation of S-Binol adduct of formula XIV.

Abstract: A process for the polymerization of allylamine and its subsequent crosslinking in the presence of a dispersing agent.

Abstract: A process for preparation of optically pure or optically enriched enantiomers of sulphoxide compounds of formula (I), such as omeprazole and structurally related compounds, as well as their salts and hydrates.

Abstract: The present invention relates to a novel method for obtaining (2S,3aS,6aS)-1-[(S)-2-[[(S)-1-(ethoxycarbonyl)-3-phenylpropyl]-amino]propanoyl]octahydro cyclopenta[b]pyrrole-2-carboxylic acid, viz. Ramipril(I) in high optical purity, free of other stereoisomers, and in high bulk density. The present invention also relates to a novel hydrated form of Ramipril(I) and a process for preparation thereof.

Abstract: A dicyclohexyamine salt of compound of formula I, namely perindopril, having an X-ray powder diffraction pattern with characteristic peaks (2?): 8.462, 10.624, 18.693, 9.424, 17.272, 14.177, 19.499, 20.765, 21.409, and 14.540. A process for preparation of the said salt of perindopril and its use in the purification of an impure perindopril and a process for purification of perindropril comprising formation of its salt with dicyclohexylamine. The present invention also relates to preparation of Perindopril tert-butyl amine salt directly from Perindopril dicyclohexylamine salt without isolating the free base.

Abstract: An improved process for synthesis of duloxetine hydrochloride (1) having chiral purity greater than 99.

Abstract: The disclosure herein relates to a new Lamivudine polymorphic form, methods of making the same, and pharmaceutical formulations thereof. A (?) cis-4-amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-(1H)-pyrimidin-2-one in the form of monoclinic crystals has characteristic powder X-ray diffractogram, as disclosed herein, is disclosed along with a process for preparation of the same. A pharmaceutical composition in solid dosage unit form comprising a therapeutically effective amount of a new Lamivudine polymorphic form in combination with a pharmaceutically acceptable carrier is also disclosed along with a pharmaceutical composition useful for treating HIV infections in humans.

Abstract: A process for preparation of perindopril of formula (II) and salts thereof which is simple, safe, convenient and cost-effective. The process involves reaction of compound of formula (I), wherein X is chlorine or bromine with compound of formula (VII) wherein A signifies that the six-membered ring of the bicyclic system is either saturated or unsaturated to give compound of formula (VIII), wherein A is as defined above, followed by catalytic hydrogenation of the compound of formula (VIII) thus obtained to give the perindopril of formula (II). The above process for the manufacture of perindopril would specifically avoid the use of harmful chemicals like phosgene or costly coupling agents like dicyclohexylcarbodiimide and 1-hydroxybenxotriazole usually used for such manufacture. The process would also not require any intervention of a catalyst and does not require any alkaline or acidic reaction conditions.