benzyl 5-acetoxy-3-(2-ethoxycarbonylethyl)-4-ethoxycarbonylmethylpyrrole-2-carboxylate 、
tert-butyl 4-ethyl-3-methyl-1H-pyrrole-2-carboxylate 在
溶剂黄146 作用下,
反应 3.0h,
以550 mg的产率得到benzyl 5'-t-butoxycarbonyl-4-(2-ethoxycarbonylethyl)-3-ethoxycarbonylmethyl-3'-ethyl-4'-methyl-2,2'-dipyrrylmethane-5-carboxylate