[(2,8-Dioxo-4-phenyl-1-oxaspiro[4.5]deca-3,6,9-trien-3-yl)-[2-[2-[(2,8-dioxo-4-phenyl-1-oxaspiro[4.5]deca-3,6,9-trien-3-yl)-(4-methylphenyl)sulfonyloxy-lambda3-iodanyl]-4,6-dimethylphenyl]-3,5-dimethylphenyl]-lambda3-iodanyl] 4-methylbenzenesulfonate   、                                                                                      
potassium acetate                                                                                                                                                                                              以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以85%的产率得到(2,8-Dioxo-4-phenyl-1-oxaspiro[4.5]deca-3,6,9-trien-3-yl) acetate