3-[[[2-[3-[4-(3-Methoxyphenyl)-1-piperidinyl]-1-oxopropyl]hydrazino]carbonyl]amino]phenyl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylic acid, dimethyl ester 在
三氯氧磷 作用下,
以30%的产率得到1,4-dihydro-4-[3-[5-[2-[4-(3-methoxyphenyl)-1-piperidinyl]ethyl]-1,3,4-oxadiazol-2-yl]aminophenyl]-2,6-dimethyl-3,5-pyridinedicarboxylic acid dimethyl ester hydrochloride