dimethyl 4-(6'-O-acetyl-2',3',4'-tri-O-benzyl-α-D-galactopyranosyl)-5-phenylpyridazine-3,6-dicarboxylate                                                                                                                                                              在
                                                                                                                                                                                 
锌                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
溶剂黄146                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以57%的产率得到dimethyl 3-(6'-O-acetyl-2',3',4'-tri-O-benzyl-α-D-galactopyranosyl)-4-phenyl-1H-pyrrole-2,5-dicarboxylate