Process for removing certain linear isoprene trimers from a mixture of isoprene trimers
US4621165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1984 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Feb 23, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for removing from a mixture of isoprene trimers compounds of the formula ##STR1## by reacting a mixture of cyclic and linear trimers with a compound having an activated carbon atom, of the formula: EQU X--CH.sub.2 --Y in which one of X or Y is an electron-withdrawing group and the other is an electron-withdrawing or electron-donating group, in the presence of a catalyst consisting of a water-soluble phosphine and a rhodium compound, the reaction being carried out in water or in a water-alcohol medium, and separating the cyclic trimers and linear trimers containing the chain ##STR2## from the mixture of products of the formulae: ##STR3## which can be used, in particular, in the synthesis of vitamin E.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.