Reaction of bis(prop-2-yn-1-yl) sulfide with sulfur dichloride. First example of cyclization of bis(prop-2-yn-1-yl) chalcogenides by the action of chalcogen halides

Abstract

(E,E)-2,6-Bis(chloromethylidene)-1,4-dithiane (II) is regio- and stereoselectively obtained in an anti-Markovnikov addition at both triple bonds of compound (I).