2-mercaptomethyl-3,5-dicarboethoxy-6-methyl-4-(3-nitrophenyl)-1,4-dihydropyridine 、
聚合甲醛 在
乙酸乙酯 、
异丙醚 作用下,
以
甲醇 为溶剂,
反应 1.5h,
以obtaining 3 g of 3,5-dicarboethoxy-4-(m-nitro-phenyl)-6-methyl-2-(hydroxymethylthiomethyl)-1,4-dihydropyridine, m.p. 113°-114° C.的产率得到3,5-dicarboethoxy-6-methyl-4-[(m-nitro)-phenyl]-2-hydroxymethylmercaptomethyl-1,4-dihydropyridine