Cinchona-based bifucntional organocatalysts and method for preparing chiral hemiesters using the same
US8580964B2 · kind B2 · utility
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Key dates
| Filing date | Jan 18, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D453/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to cinchona-based bifunctional organocatalysts and methods for preparing chiral hemiesters using the same. More specifically, the present invention relates to methods for preparing chiral hemiesters from prochiral or meso cyclic acid anhydrides via desymmetrization, using bifunctional cinchona alkaloid catalysts comprising sulfonamide functional groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.