Preparation of 3-cyano-4-fluorophenol
US4760160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Jan 14, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/07
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention provides a process for the preparation of 4-fluorophenols of formula ##STR1## wherein n is 0 to 3, each R independently represents a halogen atom or an alkyl, alkoxy, cyano or optionally substituted amino group and Z represents a hydrogen or halogen atom or a cyano group characterized by reacting a fluorohalocyclohexadienone of formula ##STR2## wherein X represents a halogen atom, with a compound of formula A-Z, wherein Z is as defined above and A represents a hydrogen or alkali metal atom, provided that when both A and Z are hydrogen, the reaction is carried out in the additional presence of a Group VIII metal hydrogenation catalyst, and 4-fluorophenols of formula I per se wherein Z is a CN group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.