Synthesis of the N -aryl-oxadiazolyl-propionamide derivatives 11, 2, and 14. NH2OH-HCl, hydroxylamine hydrochloride; succ anh, succinic anhydride; DIC, N,N′-diisopropylcarbodiimide; COMU®, (1-Cyano-2-ethoxy-2-oxoethylidenaminooxy) dimethylamino-morpholino-carbenium hexafluorophosphate.