Methods of making pyrrolidones
US6603021B2 · kind B2 · utility
6Cited by
49References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2001 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Jun 18, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D201/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides methods for making N-methylpyrrolidine and analogous compounds via hydrogenation. Novel catalysts for this process, and novel conditions/yields are also described. Other process improvements may include extraction and hydrolysis steps. Some preferred reactions take place in the aqueous phase. Starting materials for making N-methylpyrrolidine may include succinic acid, N-methylsuccinimide, and their analogs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.