申请人:Mitsui Chemicals, Inc.
公开号:EP0377750A1
公开(公告)日:1990-07-18
The invention provides a process for preparing thiazolecarboxylic acid chlorides represented by general formula (II) (wherein R1 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a lower alkyl group substituted by a halogen atom or a lower alkoxy group, and R2 represents a hydrogen atom, a lower alkyl group optionally substituted by a halogen atom or a lower alkoxy group), which comprises reacting a thiazolecarboxylic acid represented by general formula (I) (wherein R1 and R2 are as defined above with respect to general formula (II) with phosgene or trichloromethyl chloroformate in the presence or absence of a catalyst.
本发明提供了一种制备通式(II)代表的噻唑羧酸氯化物的工艺(其中R1代表氢原子、卤素原子、低级烷基、低级烷氧基或被卤素原子或低级烷氧基取代的低级烷基,R2代表氢原子、R1代表氢原子、低级烷基、低级烷氧基或被卤素原子或低级烷氧基取代的低级烷基,R2代表氢原子、低级烷基、低级烷氧基或被卤素原子或低级烷氧基取代的低级烷基),该反应包括在催化剂存在或不存在的情况下,将通式(I)代表的噻唑羧酸(其中 R1 和 R2 如上文通式(II)所定义)与光气或氯甲酸三氯甲酯反应。