t-butyl 4-(2-methoxycarbonylethyl)-3-methylpyrrole-2-carboxylate   、                                                                                      benzyl 4-(2-acetoxyethyl)-5-acetoxymethyl-3-methylpyrrole-2-carboxylate                                                                                                                                                                                              以
                                                                                         
溶剂黄146                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以12.75 g的产率得到benzyl 3-(2-acetoxyethyl)-5'-t-butoxycarbonyl-3'-(2-methoxycarbonylethyl)-4,4'-dimethyl-2,2'-dipyrrylmethane-5-carboxylate