Ionic Liquid as Soluble Support for Synthesis of 1,2,3-Thiadiazoles and 1,2,3-Selenadiazoles
作者:Anil Kumar、Manoj Kumar Muthyala、Sunita Choudhary、Rakesh K. Tiwari、Keykavous Parang
DOI:10.1021/jo301607a
日期:2012.10.19
3-selenadiazoles was achieved using an ionic liquid as a novel soluble support. Ionic liquid-supported sulfonyl hydrazine was synthesized and reacted with a number of ketones to afford the corresponding ionic liquid-supported hydrazones that were converted to 1,2,3-thiadiazoles in the presence of thionylchloride. The reaction of ionic liquid-supported hydrazones with selenium dioxide in acetonitrile afforded
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.
Regio- and stereoselective synthesis of thiazoline derivatives <i>via</i> the thioketene-induced ring expansion of aziridines
作者:Qiuyue Wu、Jiaxi Xu
DOI:10.1039/d1cc06535a
日期:——
Metal-free thioketene-induced ring expansion of aziridines gave 4-alkylthiazolines stereospecifically from 2-alkylaziridines through an intramolecular substitution at the less substituted ring carbon and 5-arylthiazolines stereoselectively from 2-arylaziridines via tandem ring cleavage and formation through intimate ion-pair intermediates after nucleophilic addition of aziridines to thioketenes generated