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.
1
In the above formulae, A represents:
—C≡C—R
1
(
a
)
or
2
(R
1
represents hydrogen atom, an alkyl group or an aromatic group, R
2
represents an alkyl group or an aromatic group) and X represents a halogen atom.
本发明揭示了一种新的芳香族
羧酸,可用作大分子化合物的材料,特别是用于表现出优异耐热性的聚缩酸大分子化合物,以及其酸卤化衍
生物和生产这些化合物的方法。所述芳香族
羧酸和其酸卤化衍
生物的结构分别表示为通式(1)和(2),可以通过本发明揭示的特定步骤的方法从异苯二
甲酸的二烷基酯衍
生物和
乙炔衍
生物高效地生产。在上述公式中,A表示:-C≡C-R1(a)或2(R1表示氢原子,烷基或芳香基,R2表示烷基或芳香基),X表示卤素原子。