4,5-Dichlorothiophene-2-carboxylic acid was obtained from the starting material thiophene-2-carboxylic acid via esterification, chlorination and hydrolysis. The chlorination reaction was achieved using N-chlorosuccinimide as the chlorinating agent with high selectivity and yield. The advantages of this synthesis route were mild reaction conditions, simplified operational procedure and the raw materials were easy to obtain. It could be applied to industrial production.
4,5-Dichlorothiophene-2-carboxylic acid(4,5-二氯噻吩-2-羧酸)是由起始原料噻吩-2-羧酸通过酯化、氯化和水解反应得到的。氯化反应以 N-氯代丁二酰亚胺为氯化剂,具有高选择性和高产率。该合成路线的优点是反应条件温和,操作程序简化,原料易得。它可以应用于工业生产。