ethyl 3-(acetylamino)-1-[4-(methyloxy)phenyl]-1H-pyrrole-2-carboxylate   、                                                                                      
N-氯代丁二酰亚胺                                                                                                                                                              在
                                                                                                                                                                                 
水   、                                                                                                  
Sodium sulfate-III   、                                                                                                  crude product   、                                                                                                  
ethyl 3-(acetylamino)-5-chloro-1-[4-(methyloxy)phenyl]-1H-pyrrole-2-carboxylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                以to give the required product ethyl 3-(acetylamino)-5-chloro-1-[4-(methyloxy)phenyl]-1H-pyrrole-2-carboxylate (3.12 g, 9.26 mmol, 86% yield) as a yellow oil的产率得到ethyl 3-(acetylamino)-5-chloro-1-[4-(methyloxy)phenyl]-1H-pyrrole-2-carboxylate