3'-hydroxy-4,4'-dimethoxy-3'-methyl-3-oxo-7,7'-bis(piperidin-1-ylcarbonyloxy)-2,2'-spirobi[2H,2'H,3H,3'H-benzo[b]thiophene]   、                                                                                      
碘甲烷                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以39%的产率得到2-[2'-acetyl-3'-methoxy-6'-(piperidin-1-ylcarbonyloxy)phenylthio]-3,4-dimethoxy-7-(piperidin-1-ylcarbonyloxy)benzo[b]thiophene