Process of synthesizing 4-methyl-5-formyl thiazole
Title：
Process of synthesizing 4-methyl-5-formyl thiazole
Application Number：
 200610113876
Application Date：
 2006/10/20
Announcement Date：
 2007/08/22
Pub. Date：
Publication Number：
 101020668
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C07D 277/24
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Sha Yaowu, Bai Nan
Key Words：
 4-methyl-5-formyl thiazole, synthesizing process
Abstract：
 The process of synthesizing 4-methyl-5-formyl thiazole belongs to the field of organic compound synthesizing technology. The synthesis process includes the following steps: adding thionyl chloride into 4-methyl thiazolyl-5-formic acid, refluxing and spiral drying to obtain 4-methyl thiazolyl-5-formyl chloride; dissolving in xylene, filtering, adding catalyst Pd/BaSO4 in the amount of 25 % of 4-methyl thiazolyl-5-formic acid; introducing hydrogen until 4-methyl thiazolyl-5-formyl chloride is detected to be reacted completely; filtering, extracting and spiral drying to obtain solid 4-methyl-5-formyl thiazole. The present invention adopts catalyst Pd/BaSO4 in hydrogenation to reduce acyl chloride into aldehyde, and determined catalyst Pd/BaSO4 amount, high yield, high product purity, simple reaction and no environmental pollution.
Claim：
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PCT：
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