吡啶 、
2,6-Bis-bromomethyl-4-(2-difluoromethoxy-phenyl)-1-methyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid dimethyl ester 以
丙酮 为溶剂,
反应 24.0h,
以84%的产率得到1,1'-[(4-(2-Difluoromethoxyphenyl)-3,5-dimethoxycarbonyl-1-methyl-1,4-dihydropyridine-2,6-diyl)dimethylene]bis-pyridinium dibromide