Intermediates for preparing vitamins A and E and carotenoids
US5449844A · kind A · utility
3Cited by
3References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1992 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Nov 27, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a new method of condensing polyenic compounds wherein a compound having the formula III ##STR1## is condensed with a compound having the formula IV ##STR2## under the influence of a Lewis acid or a protic acid. R.sub.1 through R.sub.7 represent alkyl or alkenyl groups, A' is preferably chlorine, B is preferably a hydroxyl group, and n' is 0 to 10. The invention also relates to novel intermediates for use in the preparation of Vitamins A and E produced by means of the new method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.