Patent application number | Description | Published |
20090281053 | NOVEL CRYSTALLINE FORM OF LAMIVUDINE - 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. | 11-12-2009 |
20100105925 | NOVEL PROCESS FOR PREPARATION OF DULOXETINE HYDROCHLORIDE - An improved process for synthesis of duloxetine hydrochloride (1) having chiral purity greater than 99.9% that is characterized by the following:
| 04-29-2010 |
20120028340 | KINETIC RESOLUTION OF (4S) -- 4- PHENYL -- 3- [(5RS)-5-(4-FLUROPHENYL)-5-HYDROXYPENTANOYL] --1,3-OXAZOLIDIN-2-ONE TO THE (5S) ISOMER VIA LIPASECATALYZED ENANTIOSELECTIVE ESTERIFICATION OF THE (5R) ISOMER - 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. | 02-02-2012 |
20120237770 | NOVEL PROCESS FOR PREPARATION OF DARUNAVIR AND DARUNAVIR ETHANOLATE OF FINE PARTICLE SIZE - 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 d | 09-20-2012 |
20120316238 | NOVEL POLYMOMORPH OF DESVENLAFAXINE BENZOATE - 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. | 12-13-2012 |
20120316361 | METHOD OF RESOLUTION OF (RS)- 1,1'-BI-2-NAPHTHOL FOR OBTAINING ENANTIOMERIC PURE I.E. (S)-(-)-1,1'-BI-2-NAPHTHOL AND/OR (R)-(+)-1,1'-BI-2-NAPHTHOL VIA CO-CRYSTAL FORMATION WITH OPTICALLY ACTIVE DERIVATIVES OF y -AMINO ACIDS - 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 γ-amino acids. | 12-13-2012 |
20130096319 | PROCESS FOR PREPARATION OF AMISULPRIDE - 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. | 04-18-2013 |
20130174651 | PROCESS FOR PREPARATION OF SUBSTANTIALLY PURE FOSAMPRENAVIR CALCIUM AND ITS INTERMEDIATES - The present invention relates to fosamprenavir calcium (Ia) substantially free of isomer impurity, (3R) tetrahydro -3 -furanyl(1S,2R)-3-[[(4-aminophenyl)sulfonyl](isobutyl)amino]-1-benzyl-2-(phosphonooxy)propyl carbamate (Ib), and its process for preparation thereof. The present invention also provides fosamprenavir calcium intermediate, (S)-3-tetrahydrofuranyl-N-succinimidyl carbonate (IIa) substantially free of (R)-3-tetrahydrofuranylsuccinimidyl carbonate (IIb) and its process for preparation thereof. | 07-11-2013 |
20130225845 | PROCESS FOR PREPARATION OF ESTRADIOL VALERATE AND A NOVEL CRYSTALLINE FORM A OF ESTRADIOL DIVALERATE - The present invention relates to the process for the preparation of estradiol valerate (I) which involves isolation of crystalline estradiol divalerate (III) by crystallization from an alcoholic solvent. | 08-29-2013 |
20130296562 | STEREOSELECTIVE PROCESS FOR PREPARATION OF 1,3-OXATHIOLANE NUCLEOSIDES - The present invention relates to a stereoselective glycosylation for the preparation of 1,3-oxathiolane nucleoside in high yield and high optical purity. The invention specifically relates to a process of the preparation of Lamivudine and Emtricitabine using zirconium (IV) chloride (ZrCl | 11-07-2013 |
20130324748 | PROCESS FOR PREPARATION OF LEVONORGESTREL - The present invention provides an improved process for preparation of levonorgestrel (3) which comprises of hydrolysis of 13β-ethyl-3-methoxy-17α-ethynyl-gona-2,5(10)-dien-17β-ol (2) with an acid in aprotic solvent. The present invention also provides a novel process for purification of crude levonorgestrel (3) by recrystallization from N,N-dimethyl formamide-water; methanol-water mixture. | 12-05-2013 |
20140066638 | NOVEL PROCESS FOR PREPARATION OF DARUNAVIR AND DARUNAVIR ETHANOLATE OF FINE PARTICLE SIZE - 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 d | 03-06-2014 |
20140155607 | Novel Salts of Raltegravir - The present invention provides novel salts of raltegravir, viz., meglumine salt, erbumine salt, ammonium salt, tris salt and L-arginine salt of raltegravir and processes for their preparation. | 06-05-2014 |
20140179930 | PROCESS FOR THE PREPARATION OF OLMESARTAN MEDOXOMIL - The present invention provides novel process for preparation of olmesartan medoxomil (I) substantially free of olmesartan acid impurity (II) comprising, reacting trityl olmesartan medoxomil (III) with acid, filtering the precipitate of trityl alcohol, subjecting the filtrate to agitated thin film drying and recovering olmesartan medoxomil (I). | 06-26-2014 |
20140256959 | PROCESS FOR PREPARATION OF SUBSTANTIALLY PURE FOSAMPRENAVIR CALCIUM AND ITS INTERMEDIATES - The present invention relates to fosamprenavir calcium (Ia) substantially free of isomer impurity, (3R) tetrahydro-3-furanyl(1S,2R)-3-[[(4-aminophenyl)sulfonyl](isobutyl)amino]-1-benzyl-2-(phosphonooxy)propyl carbamate (Ib), and its process for preparation thereof. The present invention also provides fosamprenavir calcium intermediate, (S)-3-tetrahydrofuranyl-N-succinimidyl carbonate (IIa) substantially free of (R)-3-tetrahydrofuranylsuccinimidyl carbonate (IIb) and its process for preparation thereof. | 09-11-2014 |
20140357871 | PROCESS FOR PREPARATION OF RUFINAMIDE - The present invention relates to a novel process for preparation of rufinamide (I) comprising: reacting 2,6-difluorobenzyl azide (II) and propiolic acid (III) in a mixture of alcohol and water to produce 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid (IV), esterifying the acid (IV) to ester (V) and treating ester (V) with ammonia. The invention further relates to process for purification of 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid (IV), by crystallization from a mixture of alcohol and water. The present invention also provides process for purification of rufinamide (I) by crystallization from mixture of polar aprotic solvent with water or alcohol. | 12-04-2014 |