1,5-Dihydro-1,2,3,4-thia(S IV )triazoles from quaternary salts of NN-disubstituted thioamides and sodium azide
作者:Susan I. Mathew、Frank Stansfield
DOI:10.1039/p19740000540
日期:——
Quaternary salts [e.g.(I)] of disubstituted thioamides react with aqueous sodium azide at room temperature giving high yields of products which are probably 1,5,5-trisubstituted 1,5-dihydro-1,2,3,4-thia(SIV)triazoles [e.g.(III)]. These are decomposed by dilute acids with loss of nitrogen giving amidines [e.g.(VII)] and thiosulphinic S-esters [e.g.(VIII)]. When the thiatriazole (III) is heated in solution
二取代硫代酰胺的季盐[例如(I)]在室温下与叠氮化钠水溶液反应,可高收率得到大约为1,5,5-三取代的1,5-二氢-1,2,3,4-硫杂(S IV)三唑[例如(III)]。它们被稀酸分解而失去氮,得到giving [例如(VII)]和硫磺S-酯[例如(VIII)]。当将噻三唑(III)在甲苯或环己烯中的溶液中加热时,分别形成苯甲醛或环己-2-烯酮的二硫缩醛。