Patent application number | Description | Published |
20080306257 | Syntheses and Preparations of Narwedine and Related Novel Compounds - 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. | 12-11-2008 |
20080312455 | 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): | 12-18-2008 |
20090043126 | Process and Methods for the Preparation of Gabapentin and Its Intermediates - The invention provides a process for preparing gabapentin and its intermediates. The process generally involves treating gabapentin lactam with an aqueous solution of hydrobromic acid to yield gabapentin hydrobromide salt as an intermediate, which can be isolated by filtration. The gabapentin hydrobromide salt can then be hydrolyzed with a base, such as an organic amine, to yield gabapentin that can be isolated by filtration. | 02-12-2009 |
20090076262 | 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][1,4]thiazepin-11(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 11-chloro-dibenzo[bf][1,4]thiazepine is reacted with 2-(2-piperazin-1-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. | 03-19-2009 |
20090247642 | SYNTHESIS AND PREPARATIONS OF METOPROLOL AND ITS SALTS - The invention relates to an improved process for preparing metoprolol and its salts. | 10-01-2009 |
20090292141 | NEW METHOD FOR OBTAINING AN AMINOINDAN MESYLATE DERIVATIVE - The invention relates to processes for preparing rasagiline mesylate that avoid the use of alcohol solvents, thereby producing rasagiline mesylate free of any alkyl mesylates, including isopropyl mesylate. The invention further relates to processes for purifying rasagiline mesylate to obtain a product free of alkyl mesylates, and to the thus obtained rasagiline mesylate. | 11-26-2009 |
20100280272 | METHOD FOR OBTAINING AN AMINOINDAN MESYLATE DERIVATIVE - The invention relates to processes for preparing rasagiline mesylate that avoid the use of alcohol solvents, thereby producing rasagiline mesylate free of any alkyl mesylates, including isopropyl mesylate. The invention further relates to processes for purifying rasagiline mesylate to obtain a product free of alkyl mesylates, and to the thus obtained rasagiline mesylate. | 11-04-2010 |
20110034731 | Solid Forms Of An N-(Phenylmethyl)Propanamide Derivative And Processes Of Preparation - The invention relates to solid forms of the anti-epileptic agent lacosamide (I). The invention also relates to mixtures of solid forms of lacosamide. The invention further relates to mixtures of lacosamide enantiomers crystallized in a conglomerate Form and the use thereof in providing enantiomerically enriched lacosamide, preferably lacosamide enriched with the (R)-enantiomer of lacosamide. | 02-10-2011 |
20110313200 | New Method for Obtaining an Aminoindan Mesylate Derivative - The invention relates to processes for preparing rasagiline mesylate that avoid the use of alcohol solvents, thereby producing rasagiline mesylate five of any alkyl mesylates, including isopropyl mesylate. The invention further relates to processes for purifying rasagiline mesylate to obtain a product free of alkyl mesylates, and to the thus obtained rasagiline mesylate. | 12-22-2011 |
20130065965 | DI(4-CHLORO-PHENYLDIGUANIDO) DERIVATIVE WHICH IS FREE OF POTENTIAL GENOTOXICITY AND A PROCESS FOR REDUCING THE RESIDUAL AMOUNT OF P-CHLOROANILINE IN SAID DI(4-CHLORO-PHENYLDIGUANIDO) DERIVATIVE - The invention relates to a process for reducing the residual amount of p-chloroaniline in chlorhexidine. Also, the invention relates to a process for preparing chlorhexidine, or a pharmaceutically acceptable salt thereof, which is free of potential genotoxicity. In addition, the invention refers to the said chlorhexidine, or a pharmaceutically acceptable salt thereof, which is free of potential genotoxicity. Further, the invention relates to an analytical HPLC method for the determination of potentially genotoxic impurities in samples of chlorhexidine, or of a pharmaceutically acceptable salt thereof. The invention also relates to stabilized chlorhexidine digluconate salt free of potential genotoxicity in aqueous solution, and to a method for stabilizing chlorhexidine digluconate salt free of potential genotoxicity in aqueous solution. | 03-14-2013 |
20130095535 | ENZYMATIC RESOLUTION OF RACEMIC (2R,S)-2-(ACETYLAMINO)-3-METHOXY-N-(PHENYLMETHYL)PROPANAMIDE - The present invention is concerned with a process of preparing (R)-lacosamide. The process comprises providing an (R,S)-lacosamide precursor and contacting the same with at least an enzyme in the presence of a solvent. The enzyme either stereoselectively hydrolyzes or acetylates an (R)- or (S)-enantiomer of the (R,S)-lacosamide precursor. The process further comprises where appropriate also concurrently, or successively, employing one or more reagents capable of converting the hydrolysed or acetylated (R)- or (S)-enantiomer to (R)-lacosamide. | 04-18-2013 |
20130131164 | STABILIZED PHENYLCARBAMATE DERIVATIVE IN SOLID STATE - The invention relates to retigabine with improved color quality, and to processes for preparing the same. In addition, the invention relates to a process for drying wet retigabine. Also, the invention relates to stabilized or substantially stabilized retigabine in solid state, or a mixture or pharmaceutical formulation comprising the same. Further, the invention also relates to an improved process for preparing retigabine. | 05-23-2013 |
20130225686 | SOLID FORMS OF AN N-(PHENYLMETHYL) PROPANAMIDE DERIVATIVE AND PROCESSES OF PREPARATION - The invention relates to solid forms of the anti-epileptic agent lacosamide (I). The invention also relates to mixtures of solid forms of lacosamide. The invention further relates to mixtures of lacosamide enantiomers crystallized in a conglomerate Form and the use thereof in providing enantiomerically enriched lacosamide, preferably lacosamide enriched with the (R)-enantiomer of lacosamide. | 08-29-2013 |