申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US05136042A1
公开(公告)日:1992-08-04
Disclosed herein is a process for the preparation of a thiazolecarboxylic acid chloride represented by the following general formula (II): ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom, a lower alkyl group, a lower alkoxy group, or a lower alkyl group substituted by a halogen atom or lower alkoxy group, and R.sub.2 represents a hydrogen atom, a lower alkyl group, or a lower alkyl group substituted by a halogen atom or lower alkoxy group, which comprises reacting a thiazolecarboxylic acid represented by the following general formula (I): ##STR2## wherein R.sub.1 and R.sub.2 have the same meanings as defined with respect to formula (II), with phosgene or trichloromethyl chloroformate in the presence or absence of a catalyst.
本文揭示了一种制备由下述通式(II)表示的噻唑羧酸氯化物的方法:##STR1## 其中R.sub.1代表氢原子或卤素原子、低碳烷基基团、低碳氧基基团或被卤素原子或低碳氧基基团取代的低碳烷基基团,R.sub.2代表氢原子、低碳烷基基团或被卤素原子或低碳氧基基团取代的低碳烷基基团,包括将由下述通式(I)表示的噻唑羧酸:##STR2## 其中R.sub.1和R.sub.2的含义与通式(II)中定义的含义相同,与光气或三氯甲基氯甲酸酯在催化剂的存在或缺席下反应。