2-(1H-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate   、                                                                                      
3-(甲硫基)-4-氧代-4,5,6,7-四氢-2-苯并噻吩-1-羧酸   、                                                                                      
N,N-二异丙基乙胺   、                                                                                      
4-{3-[N,N-bis-(tert-butoxycarbonyl)aminomethyl]-phenyl}-piperidine                                                                                                                                                              在
                                                                                                                                                                                 silica   、                                                                                                  
二氯甲烷                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 16.17h,
                                                                                                                以1-{1-[4-(3-(N,N-di-tert -butoxycarbonylaminomethyl)phenyl)-piperidin-1-yl]-methanoyl}-3-methylsulfanyl-6,7-dihydro-5H-benzo[c]thiophen-4-one was isolated as a colorless oil (177 mg)的产率得到1-{1-[4-(3-(N,N-di-tert-butoxycarbonylaminomethyl)phenyl)-piperidin-1-yl]-methanoyl}-3-methylsulfanyl-6,7-dihydro-5H-benzo[c]thiophen-4-one