Preparation of fluorine-containing diphenyl ethers
US4384135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Jan 19, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C311/03
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of preparing a diphenyl ether compound of the formula (II) ##STR1## wherein X is F, Cl or Br; Z is hydrogen, halogen, NO.sub.2 of CN; and W is methyl, cyano, CH.sub.3 CO--, or a group --C--OR, wherein R is --OH; --OM wherein M is a cation; OR.sup.1 wherein R.sup.1 is an optionally substituted aliphatic radical; --NR.sup.2 R.sup.3 wherein R.sup.2 and R.sup.3 are each hydrogen or an optionally substituted aliphatic radical; or --NHSO.sub.2 R.sup.4 wherein R.sup.4 is alkyl of 1 to 6 carbon atoms, which comprises reacting a 3-X-substituted-4,5-difluorobenzotrifluoride with a salt of a 3,4-W,Z-substituted phenol. The invention further comprises novel 3-X-4,5-difluorobenzotrifluorides for use in the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.