Electrochemical enaminone C–H thiolation/C–N amination cascade for thiazole synthesis and its diastereoselective dearomatization
作者:Haijin Guo、Yunyun Liu、Chengping Wen、Jie-Ping Wan
DOI:10.1039/d2gc01644c
日期:——
An electrochemical method for the synthesis of 2-aminothiazoles via aryl ring construction using enaminones and thioureas is reported. The cascade enamine C–H thiolation and C–N amination constitutes a major transformation for the thiazole ring formation. Moreover, a simple modification of electrochemical conditions enables the tunable dearomatization of the thiazole ring via vicinal dialkoxylation
Synthesis of 2-Amino-5-acylthiazoles by a Tertiary Amine-Promoted One-Pot Three-Component Cascade Cyclization Using Elemental Sulfur as a Sulfur Source
A novel one-pot three-component cascade cyclization strategy for the synthesis of 2-amino-5-acylthiazoles using enaminones, cyanamide, and elemental sulfur has been developed. The reported methods have demonstrated good tolerance of various functional groups. Up to 28 2-amino-5-acylthiazole compounds bearing diverse structural differences were successfully synthesized from easily obtained starting materials with moderate to excellent yields. Our method provides an effective way for the access of valuable and potentially bioactive 2-amino-5-acylthiazole derivatives.
2-Amino-4-dimethylamino-1-thia-3-azabutadienes as Precursors of Thiazoles
作者:C. Landreau、D. Deniaud、A. Reliquet、J. C. Meslin
DOI:10.1080/10426500214568
日期:2002.11.1
The reaction of 2-amino-4-dimethylamino-1-thia-3-azabutadienes 1 with alpha-bromoketones gave rise to 2-aminothiazoles 2 together with 2-(N,N-dimethylaminomethylenamino)thiazoles 3. Competitive mechanisms are described. Furthermore, reaction of diene 1a with,methyl a-bromoacetate or hydroxylrimine-O-sulfonic acid yielded respectively 2-(N,N-dimethylaminomethylenamino)thiazolin-4-one 4 and 5-amino-1,2,4-thiadiazole 5.
Patel,H. et al., Indian Journal of Chemistry, 1970, vol. 8, p. 376 - 377