Cymenol preparation by transfer dehydrogenation
US5068466A · kind A · utility
1Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Sep 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C33/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the conversion of 8-hydroxymenthenes into 8-hydroxycymenes by reacting the 8-hydroxymenthenes in the liquid phase in the presence of a dehydrogenation catalyst, e.g. palladium and a hydrogen acceptor e.g. mesityl oxide. The process is preferably carried out at 80.degree.-150.degree. C. and in the presence of base. The process is particularly suitable for converting 8-hydroxy-p-menth-1-ene into 8-hydroxy-p-cymene. The reaction products are of value as intermediates in the preparation of fragrance chemicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.