Twenty-one new (un)substituted benzoylureas and (un)substituted phenoxyacetylureas have been synthesized by the reaction of 2-amino-5-mercapto-1,3,4-thiadiazole with (un)substituted benzoyl isocy-anates and (un)substituted phenoxyacetyl isocyanates, respectively, and their structures were confirmed by IR,1H NMR spectra and elemental analysis.

Synthesis and Fungicidal Activity of N-(1,3,4-Oxadiazol-2-yl)-N′4-bromo-phenoxyacetylthioureas;