ethyl (7E)-7-[(4-methoxyphenyl)hydrazinylidene]-1-[(4-methoxyphenyl)methyl]-5,6-dihydro-4H-indole-2-carboxylate                                                                                                                                                              在
                                                                                                                                         polyphosphoric acid trimethylsilyl ester                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
硝基甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 5.0h,
                                                                                                                生成                                                 
ethyl 7-methoxy-1-(4-methoxybenzyl)-1H,10H-pyrrolo[2,3-a]carbazole-2-carboxylate