4'-(7-oxabicyclo[2.2.1]-5-heptane-2,3-dicarboximide)benzoic acid   、                                                                                      
二正丁基氧化锡                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        以71.6%的产率得到[[4-[(3aS,4R,7S,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydro-4,7-epoxyisoindol-2-yl]benzoyl]oxy-dibutylstannyl] 4-[(3aS,4R,7S,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydro-4,7-epoxyisoindol-2-yl]benzoate