PROCESS FOR PREPARING 1-[/2S/-METHYL-3 -MERCAPTO-PROPIONYL]-PYRROLIDINE-/2S/-CARBOXYLIC ACID

摘要

A process for preparing 1-¢/2S/-methyl-3-mercapto-propionyl!-pyrrolidine-/2S/-carboxylic acid The invention relates to a novel process for preparing 1-¢/2S/-methyl-3-mercaptopropionyl!-pyrrolidine-/2S/- -carboxylic acid of the formula I (I) in which 1-¢/2S/-methyl-3-thiocyanatopropionyl!-pyrrolidine- -/2S/-carboxylic acid of the formula II (II) is dissolved in an aqueous mineral acid, the solution obtained is diluted with water and the 1-¢/2S/-methyl-3-carbamoylthio-propionyl!-pyrrolidine-/2S/-carboxylic acid of the formula III (III) that forms is hydrolized with an aqueous solution of a base.