The invention disclosed in this application relates to an improved process for the preparation of polylactic acid by dehydration condensation of a lactic acid in the presence of an inert atmosphere using an inorganic solid acid catalyst.The polylactic acid thus obtained has been characterized and the polymer obtaine...

ABSTRACT IMPROVED PROCESS FOR THE PREPARATION OF d-threo-RiTAlAmC ACJt) HYDROCHLORIDE BY RESOLUTION OF dl^threo-mjAHMC ACID USING CHIRAL CARBOXYLIC ACID The invention disclosed in this application relates to an improved process for the manufacture of (/-//ireo-ritalinic acid hydrochloride and l-threo-ntalinic ac...

The invention relates to an improved process for the preparation of 3-hydroxy benzodiazepines which comprises hydrolyzing 3-acyloxy benzodiazepines using catalytic amounts of mild alkali such as alkali metal bicarbonates in the presence of lower alcohols containing up to three carbons and isolating the compound of t...

This process involves the initial alpha-chlorination of l-phenyl-2-(1 -pyrrolidinyl)propane-l-ol hydrochloride with thionyl chloride to obtain the chloro derivative at carbon-1, namely, l"Chloro-l-phenyI-2-(l-pyrrolidinyl)prepare hydrochloride. The chloro compound is then subjected to nucleophilic substitution react...

The invention disclosed in this application relates to new chiral beta-amino alcohols and their synthesis from R (-)-phenyl acetyl carbinol. This synthesis involves the preparation of imino derivative of R (-)-phenyl acetyl carbinol followed by asymmetric reduction in the presence of noble metal catalyst .The precis...

The invention disclosed in this application relates to 1 -phenyl-1 -(N-alkylamino)-2-nitropropanes and their syntheses from the reaction of l-phenyl-2-nitropropene with primary or secondary alkylamines. The study describes utility of Michael addition reactions in the preparation. The precise experimental conditions ...

The invention disclosed in this application relates to optically pure 1-alkyl/aryl-l-phenyl-2-methylaminopropanol hydrochlorides and new synthetic process for their preparation. This process involves the stereospecific nucleophilic addition of the alkyl/aryl Grignard reagents to the carbonyl function in chiral l-phe...

The invention disclosed in this patent relates to an improved process for the preparation of therapeutically active (1R, 2S)-Methoxamine, its salts and stereo isomers with high chiral purity. The (1R, 2S)-Methoxamine, prepared by the process of the present invention has wide applications as a pressor agent, as a ...

Novel process for the preparation of R-Phenylacetylcarbinol and P- aminoalcohols Disclosed herein is a process for the manufacture of (R)-phenylacetylcarbinol ((R)-PAC), (1R,2S)-Ephedrine and its salts, (lR,2S)-norephedrine and its salts and l-(Phenyl/Substituted phenyl)-2-(amino/alkylamino/dialklyamino) propan-1-o...

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