申请人:SUMITOMO BAKELITE CO., LTD.
公开号:EP1346975A1
公开(公告)日:2003-09-24
A novel aromatic carboxylic acid useful as a material for macromolecular compounds and, in particular, for polycondensed macromolecular compounds exhibiting excellent heat resistance, an acid halide derivative thereof and a process for producing these compounds are disclosed. The aromatic carboxylic acid and the acid halide derivative thereof have structures represented general formulae (1) and (2), respectively, and can be efficiently produced from a dialkyl ester derivative of isophthalic acid and an acetylene derivative in accordance with the disclosed process comprising specific steps.
In the above formulae, A represents:- C≡C-R1 or
(R1 represents hydrogen atom, an alkyl group or an aromatic group, R2 represents an alkyl group or an aromatic group) and X represents a halogen atom.
本发明公开了一种新型芳香族羧酸,可用作高分子化合物的材料,特别是用于具有优异耐热性的缩聚高分子化合物,还公开了其酸性卤化物衍生物以及生产这些化合物的工艺。芳香族羧酸及其酸性卤化物衍生物的结构分别代表通式(1)和(2),可根据所公开的包括特定步骤的工艺,从间苯二甲酸的二烷基酯衍生物和乙炔衍生物中有效地制取。
在上式中,A 代表:- C≡C-R1 或
(R1代表氢原子、烷基或芳香基,R2代表烷基或芳香基),X代表卤素原子。