Preparation of 4,4-disubstituted cyclohexadienones
US4663487A · kind A · utility
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9Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 14, 1986 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jan 14, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides a process for the preparation of 4,4-disubstituted cyclohexadienones of which at least one of the substituents is fluorine, which comprises reacting a compound of formula ##STR1## wheren X represents a hydrogen or halogen atom or an alkyl group, each R independently represents a halogen atom or an alkyl, alkoxy, or cyano or optionally substituted amino group, Z represents a hydrogen atom or an alkyl, acyl or aryloxycarbonyl group, and n is 0 to 4, with hydrogen fluoride and a Pb(IV) compound, in the presence of a compound which acts as a base towards HF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.