Z-6-chloro-3-[5-chloro-2-(1-methoxycarbonyl-1-methyl-ethoxy)-benzylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester   、                                                                                      
1-(2,3-difluoro-6-methyl-phenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        以to give the title compound as a white solid (510 mg)的产率得到6-chloro-4'-[5-chloro-2-(1-methoxycarbonyl-1-methyl-ethoxy)-phenyl]-2'-(2,3-difluoro-6-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione