The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1994
Filed:
Mar. 01, 1993
Geza Schneider, Budapest, HU;
Gabor Blasko, Budapest, HU;
Agnes Kovacs nee Palotai, Budapest, HU;
Gabriella rmos nee Lassu, Budapest, HU;
Ilma Dinnyes nee Nagy, Budapest, HU;
Ivan Beck, Budapest, HU;
Elemer Jakfalvi, Budapest, HU;
Andras Dietz, Budapest, HU;
Egis Gyogyszergyar Rt., Budapest, HU;
Abstract
The invention relates to a novel process for preparing 1-[/2S/-methyl-3-mercaptopropionyl]-pyrrolidine-/2S/-carboxylic acid of the formula I ##STR1## in which 1-[/2S/-methyl-3-thiocyanatopropionyl]-pyrrolidine-/2S/-carboxylic acid of the formula II ##STR2## is dissolved in an aqueous mineral acid, the solution obtained is diluted with water and the 1-[/2S/-methyl-3-carbamoylthiopropionyl]-pyrrolidine-/2S/-carboxylic acid of the formula III ##STR3## that forms is hydrolized with an aqueous solution of a base.