Process for the synthesis of 2-hydroxy-4-alkyloxy benzophenone
US5849955A · kind A · utility
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2References
17Claims
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Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/71
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is described for the synthesis of 2-hydroxy-4-alkyloxy benzophenone by the selective alkylation of 2,4-dihydroxy benzophenone with a dialkyl carbonate, in liquid phase, in the presence of suitable catalysts, at a temperature ranging between 120.degree. and 220.degree. C. and at a total pressure ranging from 2 to 60 ate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.