Short Review on the Synthesis of Thiophene, Pyrazole, and Thiazole Derivatives

Short Review on the Synthesis of Thiophene, Pyrazole, and Thiazole Derivatives The review summarizes the synthesis of different thiophene, pyrazole, and thiazole derivatives by refluxing 9a in ethanol with a catalytic amount of TEA or leaving it in DMF containing potassium carbonate at room temperature overnight to afford the corresponding thiophene derivative 10a. In addition, cyclization of Schiff bases with thioglycollic acid in the presence of a catalytic amount of ZnCl2 yielded novel thiophene derivatives. Condensation of 2‐substituted‐4‐methylythio semi‐carbazides 92 with carbonyl compounds under strong acidic conditions afforded 2‐thiazolines. Also, carboxylic acid reacted with 2‐thioethylamine in the presence of triphenylphosphine and triethylamine to afford 2‐thiazolines 98. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Chinese Chemical Society Wiley

Short Review on the Synthesis of Thiophene, Pyrazole, and Thiazole Derivatives

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
© 2018 The Chemical Society Located in Taipei & Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
0009-4536
eISSN
2192-6549
D.O.I.
10.1002/jccs.201700207
Publisher site
See Article on Publisher Site

Abstract

The review summarizes the synthesis of different thiophene, pyrazole, and thiazole derivatives by refluxing 9a in ethanol with a catalytic amount of TEA or leaving it in DMF containing potassium carbonate at room temperature overnight to afford the corresponding thiophene derivative 10a. In addition, cyclization of Schiff bases with thioglycollic acid in the presence of a catalytic amount of ZnCl2 yielded novel thiophene derivatives. Condensation of 2‐substituted‐4‐methylythio semi‐carbazides 92 with carbonyl compounds under strong acidic conditions afforded 2‐thiazolines. Also, carboxylic acid reacted with 2‐thioethylamine in the presence of triphenylphosphine and triethylamine to afford 2‐thiazolines 98.

Journal

Journal of the Chinese Chemical SocietyWiley

Published: Jan 1, 2018

Keywords: ; ; ; ;

References

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