Aromatic carboxylic acid and that acid chloride chemical material, and synthesis method

摘要

PROBLEM TO BE SOLVED: To provide a new aromatic carboxylic acid and its acid chloride useful as a raw material for a condensation polymer having high heat-resistance.;SOLUTION: The aromatic carboxylic acid is expressed by general formula (1) (Z is a group of formula (2) or formula (3); and X is H, an alkyl or an aromatic group). The acid chloride is an acid chloride derivative of the aromatic carboxylic acid. The aromatic carboxylic acid is synthesized by coupling an eliminable group of an aromatic carboxylic acid ester having the eliminable group to a compound having an acetylene group, demethylating the carboxyl terminal of the obtained compound in the presence of an alkali metal hydroxide and treating the carboxyl terminal with an acid.;COPYRIGHT: (C)2005,JPO&NCIPI