NOVEL FORMATION OF 1,2-DITHIOLANE-3-THIONE FROM beta-DITHIOLACTONE

摘要

The sulfurization of beta-dithiolactone gave l,2-dithiolane-3-thione via an ionic intermediate.The reaction of l,2-dithiolane-3-thione with acetylenedicarboxylate esters gave the corresponding spirocyclic 1,3-dithioles in good yields,whereas the reaction of 5-methyl-l,2-dithiole-3-thione with DMAD afforded a 1:2 cycloadduct in 78% yield.