Process for the preparation of 2-hydroxy-4-(hydroxyalkoxy)-benzophenone
US4978797A · kind A · utility
1Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/71
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for the preparation of 2-hydroxy-4-(hydroxyalkoxy)-benzophenone. More particularly the invention is directed to the oxyalkylation of 2,4-dihydroxy benzophenone, using C.sub.2 to C.sub.4 alkylene oxides in the presence of a basic catalyst and water. Such products are useful as ultraviolet light absorbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.