Parallel synthesis of 1,2,4-oxadiazoles using CDI activation.

1,2,4-Oxadiazoles have been prepared in parallel using 1,1'-carbonyldiimidazole (CDI) as a reagent for both formation and cyclodehydration of O-acyl benzamidoximes. The use of CDI facilitates parallel purification of the oxadiazole products by simple liquid-liquid extraction and filtration.