Method for production of pyrrolidinone derivatives
US6555694B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Oct 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/277
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound represented by the following formula (12) useful as an intermediate for production of drug or agricultural chemical: (wherein R21 to R25 are each independently a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, a perfluoroalkyl group of 1 to 4 carbon atoms, a cyano group, a nitro group, an amino group, a carboxyl group, a thiol group, an alkylthio group of 1 to 4 carbon atoms or a carbamoyl group) can be produced by reacting a compound represented by the formula (13): (wherein R21 to R25 have the same definitions as given above) with 1,1-cyclopropanedicarboxylic acid. The compound of the formula (12) is useful as a raw material for production of a pyrrolidinone compound useful as an active ingredient of drug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.