2-Benzenesulfonylmethyl-5-cyano-6-methyl-4-(2-trifluoromethyl-phenyl)-1,4-dihydro-pyridine-3-carboxylic acid methyl ester 在
吡啶 、
pyridinium hydrobromide perbromide 作用下,
以
氯仿 为溶剂,
反应 0.75h,
以66%的产率得到2-(Benzenesulfonyl-bromo-methyl)-5-cyano-6-methyl-4-(2-trifluoromethyl-phenyl)-1,4-dihydro-pyridine-3-carboxylic acid methyl ester