Silica gel supported bis-cinchona alkaloid derivatives and a preparation method and use thereof
US6197994A · kind A · utility
2Cited by
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11Claims
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Assignee
Inventors
Key dates
| Filing date | May 4, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | May 4, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to silica gel supported bis-cinchona alkaloid compounds of the formula: ##STR1## wherein Q is dihydroquininyl or dihydroquinindinyl; X is a compound having 4 carbon atoms; and R is methoxy, ethoxy or methyl; and methods of preparation and use thereof. The silica gel supported bis-cinchona alkaloid derivatives of this invention are useful re-useable catalysts for preparing vicinal diols by asymmetric dihydroxylation of olefins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.