5-Cyano-2-hydroxy-2-methyl-6-morpholin-4-yl-4-(3-nitro-phenyl)-1,2,3,4-tetrahydro-pyridine-3-carboxylic acid methyl ester 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
反应 3.0h,
以85%的产率得到5-Cyano-2-methyl-6-morpholin-4-yl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3-carboxylic acid methyl ester