Process for preparing diphenylalkene derivatives
US4898941A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1987 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Aug 11, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/155
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a diphenylalkene derivative of the formula [II] ##STR1## which comprises oxidizing a diphenylalkanoic acid derivative of the formula [I] ##STR2## wherein R.sub.1 and R.sub.2 are each substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aralkyl or substituted or unsubstituted aryl, R.sub.1 and R.sub.2 may form a heteroring together theirwith or with an adjacent benzene ring, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10 and R.sub.11 are each hydrogen atom, halogen atom, substituted or unsubstituted alkyl, substituted or unsubstituted hydroxyl or substituted or unsubstituted amino, R.sub.12 and R.sub.13 are each hydrogen atom or substituted or unsubstituted alkyl, X is carboxyl, amide, ester or halide thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.