Abstract 2-Substituted 1, 3, 4-oxadiazoles have been examined as possible prodrugs of antidepressant hydrazides. A new method of synthesis of this heterocycle from thionoester and five new oxadiazoles substituted at the 2-position by a 4-pyridyl or 4-aminophenyl group and at the 5-position by a phenyl group are described. Abstract Les auteurs se sont intéréssés anx 1, 3, 4-oxadiazoles substitués en 2 comme d'éventuelles prodrogues d' ...