A facile synthesis of Δ2-1,3,4-thiadiazolines unsubstituted at the 4-position
Abstract
Contrary to many literature reports, the condensation of a wide variety of aldehydes and ketones with thioaroylhydrazines (ArCSNHNH2) produces 2-aryl-Δ2-1,3,4-thiadiazolines and not acyclic isomers.