Process for introducing a carboxyl group to an aromatic carboxylic acid or a derivative thereof
申请人:Hirai, Hidefumi
公开号:EP0539243A2
公开(公告)日:1993-04-28
Disclosed is a process for introducing a carboxyl group to an aromatic carboxylic acid or a derivative thereof, which comprises reacting a starting aromatic carboxylic acid, such as a benzoic acid, a biphenylcarboxylic acid, a naphthalenecarboxylic acid, a diphenylcarboxylic acid, or a derivative thereof, with a carbon tetrahalide in the presence of a cyclodextrin and an alkali metal hydroxide, thereby introducing a carboxyl group to the aromatic ring of the starting aromatic carboxylic acid or the derivative thereof in substitution for a hydrogen atom bonded thereto. By the process of the present invention, a desired aromatic polycarboxylic acid or a derivative thereof can be easily obtained with high selectivity.
本发明公开了一种向芳香族羧酸或其衍生物引入羧基的工艺,该工艺包括在环糊精和碱金属氢氧化物存在下,使起始芳香族羧酸(如苯甲酸、联苯羧酸、萘羧酸、二苯基羧酸)或其衍生物与四卤化碳反应,从而向起始芳香族羧酸的芳香环引入羧基、或其衍生物,在环糊精和碱金属氢氧化物存在下与四卤化碳反应,从而在起始芳香族羧酸或其衍生物的芳香环上引入一个羧基,以取代与其结合的氢原子。通过本发明的工艺,可以很容易地以高选择性获得所需的芳香族聚羧酸或其衍生物。