Synthesis of heterocycles from 3‐phenyl‐4‐tosylimino‐1, 3‐thiazetidine‐2‐thione

Abstract

ABSTRACT.the reagents given in Scheme I. function of 2.other I,3-thiazetidin-2-thiones (2, -R = Ph, Tol) to give the corresponding 1,2,4-dithiazolidine-3-thiones (12 and 14) in high yield.The title compound 2 is transformed into the heterocycles f! -1 by treatment with In all cases, initial nucleophilic attack occurs at the C-SThe facile ring-expansion reaction 2 -+ 2 has been successfully extended t o 4-Imino-1,3-thiazetidin-2-thiones