Acid hydrazides were coupled with acrylic acid derivatives and cyclodehydration gave 1, 3, 4-oxadiazoles. Lastly, in-situ nitrile oxide formation from aryl oximes treated with sodium hypochlorite, and subsequent 1, 3-dipolar cycloaddition to the exomethylene moiety delivered 2-(4, 5-dihydroisoxazol-5-yl)-1, 3, 4-oxadiazoles. This library was evaluated in a high-throughput screen at Dow AgroSciences. Several compounds were active against ...