Abstract A series of new N-(S-amino) sulfenylated derivatives of diacylhydrazines were synthesized by the reaction of S-aminosulfenyl chlorides with N-tert-butyl-N′-benzoyl-N- substituted benzoylhydrazines in the presence of sodium hydride, and evaluated for moulting hormone mimicking activity. In the course of syntheses, N [BOND] N bond cleavage in diacylhydrazines was found and the reaction was studied in some detail. The results of ...