Benzotriazole Mediated Synthesis of Some 5-Alkyl-Dihydro-4H-1,3,5-Dithiazines

Abstract

An efficient synthesis of N-substituted dihydro-4H-1,3,5-dithiazines is described. N,N-Bis(benzotriazolylmethyl)alkylamines 1 smoothly under go cyclisation reaction in the presence of formaldehyde and hydrogen sulfide to give 5-substituted dihydro-4H-1,3,5-dithiazines 2.