Oxopyrrolidine compounds, preparation of said compounds and their use in the manufacturing of levetiracetam and analogues
US7122682B2 · kind B2 · utility
2Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Aug 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for the preparation of (S)-(−)-α-ethyl-2-oxo-1-pyrrolidine acetamide and analogues thereof. The invention also relates to compounds of the general formula (6) wherein R1 is methyl or ethyl; and R2 is C?2#191–C?4#191 alkyl, C?2#191–C?4#191 alkenyl or C?2#191–C?4#191 alkynyl, optionally substituted by one or more halogen, and their preparation processes
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.