A metal‐ and oxidant‐free electrochemical method for synthesizing 1,2,3‐thiadiazoles by inserting elementsulfur into N‐tosylhydrazones is reported. This electrochemical transformation engages electrons as reagents to achieve redox processes, and avoid excess oxidants. The cyclic voltammograms are examined to explore the mechanism of this electrolysis reaction.
Iodine-catalyzed the reaction of substituted methyl ketone N-tosylhydrazones with elemental sulfur has been developed. The cyclizations of the ester-substituted N-tosylhydrazone substrates proceeded smoothly under optimal reaction conditions, and the corresponding products 4-alkyl-1, 2, 3-thiadiazoles are obtained. For the reaction of 4-arylbutan-2-one of N-tosylhydrazone substrates, (E)-4-styryl-1
Shafiee, A.; Vosooghi, M.; Lalezari, I., Journal of Heterocyclic Chemistry, 1980, vol. 17, p. 545 - 547
作者:Shafiee, A.、Vosooghi, M.、Lalezari, I.
DOI:——
日期:——
TBAI-Catalyzed Reaction between <i>N</i>-Tosylhydrazones and Sulfur: A Procedure toward 1,2,3-Thiadiazole
作者:Jiangfei Chen、Yan Jiang、Jin-Tao Yu、Jiang Cheng
DOI:10.1021/acs.joc.5b02280
日期:2016.1.4
A TBAI-catalyzed reaction between N-tosyl hydrazone and sulfur was developed, leading to 1,2,3-thiadiazoles in moderate to good yields. It represents a facile and practical procedure to access thiadiazole under metal-free conditions. This procedure serves as an improvement for the Hurd-Mori reaction.