Process for the preparation of thiazolecarboxylic acid chlorides
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.
PROCESS FOR PREPARING THIAZOLECARBOXYLIC ACID CHLORIDES
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.