申请人:CELANESE CORPORATION
公开号:EP0049616A1
公开(公告)日:1982-04-14
A process for preparing hydroxy aromatic carboxylic acids, or the ester derivatives thereof, comprises carbonylating a hydroxy aromatic halide in the presence of a reactive alcohol solvent and a catalytic amount of a Group VIII metal catalyst. The process has particular applicability to the preparation of 6-hydroxy-2-naphthoic acid from 6-bromo-2-naphthol, which can be easily prepared from β-naphthol, a readily available and inexpensive starting material.
制备羟基芳香族羧酸或其酯类衍生物的工艺包括在活性醇溶剂和催化量的第八族金属催化剂存在下对羟基芳香族卤化物进行羰基化。 该工艺特别适用于从 6-溴-2-萘酚制备 6-羟基-2-萘酸,而 6-溴-2-萘酚很容易从β-萘酚制备,β-萘酚是一种容易获得且价格低廉的起始原料。