Preparation of 5H-1,4,2-dithiazoles via 1,3-dipolar cycloadditions of nitrile sulphides to thiocarbonyl compounds; the first synthesis of a 3,5-diaryl-1,4,2-dithiazolium salt

Abstract

Nitrile sulphides from the thermal decomposition of 1,3,4-oxathiazol-2-ones add to thiocarbonyl compounds giving moderate to high yields of 5H-1,4,2-dithiazoles; an adduct from O-ethyl thiobenzoate has been converted into 3-(4-nitrophenyl)-5-phenyl-1,4,2-dithiazolium tetrafluoroborate.