Process for the production of mixtures of stereoisomers of 8,12-oxido-13,14,15,16-tetranorlabdane
US5470989A · kind A · utility
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3References
19Claims
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Key dates
| Filing date | Jan 18, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Jan 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/92
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Stereoisomer mixtures of 8,12-oxido-13,14,15,16-tetranorlabdane are obtained in yields of at least 95% by dehydrating cyclization of stereoisomer mixtures of 8,12-dihydroxy-13,14,15,16-tetranorlabdane in the presence of acid-loaded aluminum oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.