6-dimethylaminomethyl-7-hydroxy-2,3-dimethyl-3H-benzimidazole-5-carboxylic acid dimethylamide   、                                                                                      
1-[1-(4-氯-2-甲基苯基)-乙烯基]-吡咯烷                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以53%的产率得到5-[3-(4-chloro-2-methylphenyl)-3-oxopropyl]-4-hydroxy-N,N,1,2-tetramethyl-1H-benzimidazole-6-carboxamide