Process for the preparation of diphenyl ether derivatives
US4709081A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Sep 26, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C43/295
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of compounds of formula (I) ##STR1## wherein R.sup.1 stands for hydrogen or the group COR.sup.2, wherein PA1 R.sup.2 stands for a straight or branched chained alkyl having 1 to 8 carbon atoms optionally substituted with phenyl, naphthyl, tetrahydronaphthyl or m-phenoxy-benzyl, cycloalkyl having 3 to 6 carbon atoms optionally substituted with one or more straight or branched chained alkyl or alkenyl having 1 to 6 carbon atoms, phenyl or naphthyl. The compounds of formula (I) are prepared according to the invention by PA1 (a) reacting esters of formula (II) ##STR2## wherein X stands for chlorine or bromine and PA2 R.sup.2 has the same meanings as defined above with a phenol alkali metal salt and PA1 (b) if desired converting the diphenyl ethers so obtained to a specific compound of formula (I), m-phenoxybenzyl alcohol by the hydrolysis of the ester group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.