Process for preparing 1-[/2S/-methyl -3-mercapto-propionyl]-pyrrolidine-/2S/-carboxylic acid
US5276207A · kind A · utility
6Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1993 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Mar 1, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.