1S to 1R Epimerizations of pyrethroid intermediates
US5840958A · kind A · utility
0Cited by
8References
10Claims
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Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/333
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for preparing certain isomers of 2,2-dimethyl-3-(2,2-disubstitutedvinyl)cyclopropanecarboxylic acid or derivatives thereof. More specifically it relates to the epimerization of the 1S cyclopropanecarboxylic acid and its derivatives into the corresponding 1R isomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.