Preparation of substituted benzophenones
US4721815A · kind A · utility
1Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/553
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of a benzophenone, which process comprises contacting a feed comprising a 3-cyclohexene carboxylic acid in the vapor phase and under suitable conditions with a ketonic decarboxylative coupling catalyst to convert said carboxylic acid into a bis (3-cyclohexene) ketone and contacting said bis (3-cyclohexene) ketone with a dehydrogenation catalyst to dehydrogenate said bis (3-cyclohexene) ketone to provide said benzophenone. Suitably, the coupling catalyst comprises an oxide of manganese. A Group VIII metal-containing catalyst is a typical dehydrogenation catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.