Cycloalkylidenemethylphenylacetic acid derivatives of formula (I): ##STR1## (wherein R.sup.1 represents hydrogen or alkyl and n is an integer from 1 to 3) are prepared by reacting a benzaldehyde acid compound of formula (II): ##STR2## with an enamine derivative of formula (III): ##STR3## (wherein R.sup.2 and R.sup.3 are various organic groups) and then hydrolizing the product. The use of the acid of formula (II) rather than its corresponding ester enables the reaction to be effected with a good yield and under moderate and economical reaction conditions.
Process for the preparation of cycloalkylidenemethylphenylacetic acid
申请人:Sankyo Company Limited
公开号:US04365076A1
公开(公告)日:1982-12-21
Novel 4-(2-oxo-1-cycloalkylidenemethyl)phenylacetic acid derivatives and non-toxic pharmaceutically acceptable salts thereof are useful as anti-inflammatory agents. The compounds may be prepared by reacting a p-formylphenylacetic acid ester derivative with an enamine of cycloalkanone and hydrolyzing the resulting product, or with a cycloalkanone in the presence of a base.
Cycloalkylidenemethylphenylacetic acid derivatives and process for the
申请人:Sankyo Company Limited
公开号:US04254274A1
公开(公告)日:1981-03-03
Novel 4-(2-oxo-1-cycloalkylidenemethyl)phenylacetic acid derivatives and non-toxic pharmaceutically acceptable salts thereof are useful as anti-inflammatory agents. The compounds may be prepared by reacting a p-formylphenylacetic acid ester derivative with an enamine of cycloalkanone and hydrolyzing the resulting product, or with a cycloalkanone in the presence of a base.
Phenylacetic acid derivatives, their preparation and compositions
申请人:Sankyo Company Limited
公开号:US04461912A1
公开(公告)日:1984-07-24
Phenylacetic derivatives of formula (I): ##STR1## (wherein R represents a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group and n represents an integer from 1 to 3) and salts and esters thereof have analgesic, antipyretic and anti-inflammatory activity and may be prepared by reducing the corresponding acid or ester having an oxo group at the 2-position of the cycloalkylidene ring system and, if necessary, salifying the resulting product.