The present invention relates to an improved process for the preparation of quinazoline derivatives of strUctural formula (1), comprising reacting amines with carboxylic acids in the presence of an inert organic solvent.

ABSTRACT The present invention is directed towards "A process for the preparation of 9-hydroxy-3- (2-chloroethyl)-2- methyl-4H- pyrido [1,2a] primidin-4-one (I) and its conversion in to its hydrochloride salt"

A process for the manufacture of Isradipine(I) otherwise chemically known as 4-(4-benzofurazanyl)-l,4-dihydro-2, 6-dimethyl-3,5-pyridinedicarboxylic acid methyl 1-methylethyl ester, of high quality and relatively free from impurities, by the reaction of 2-benzo [2,1,3]-oxadiazole-4-yl methylene-3-oxo-butyric acid me...

A process for the manufacture of succinyl choline halide otherwise known as suxamethonium halide and is chemically known as 2, 2,-[(l, 4,-dioxo-l, 4-butanediyl) bis (oxy)] bis [N, N, N-trimethyl ethanaminium) dihalide comprising reaction of the bis (2-halo ethyl) succinate (III) with trimethyl amine in the presence ...

The present invention provides a process for preparing methoxy -2-teralone, comprising the steps of reducing corresponding dimethoxy naphthalene with alkali metal and alcohol in a solvent/solvent mixture at 25°C to reflux temperature to dimethoxy dihydro naphthalene (II) and refluxing the dimethoxy dihydronaphthalen...

This invention relates to an improved process for synthesizing (±)-2-Amino-N-[2-(2,5-dimethoxyphenyl]-2-hydroxyethyl acetamide monohydrochloride in good yield and in a cost effective manner from l-(2,5-dimethoxyphenyl)-2-bromoethanone by reacting the same with hexamine in the presence of novel solvent system...