Preparation of diphenylmethanes
US4990716A · kind A · utility
4Cited by
24References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 9, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Diphenylmethanes such as o-benzyltoluene are prepared by contacting a benzyl halide with a benzene in the presence of a catalytic amount of a normally solid, insoluble perfluorosulfonic acid polymer under reaction conditions. The o-benzyltoluenes are useful intermediates in the production of anthraquinone and anthracene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.