ethyl 2-formyl-3-methoxycarbonyl-6-methyl-4-(2-nitrophenyl)-1,4-dihydropyridine-5-carboxylate 在
哌啶 作用下,
以
乙醇 为溶剂,
反应 2.17h,
生成 (1R,7R)-3-Amino-2-cyano-1-dicyanomethyl-5-methyl-7-(2-nitro-phenyl)-1,7-dihydro-indolizine-6,8-dicarboxylic acid 6-ethyl ester 8-methyl ester