methyl 4-[(1S,2S)-2-[tert-butyl(dimethyl)silyl]oxy-5-methylidenecyclopentyl]-2-diazo-3-oxobutanoate                                                                                                                                                              在
                                                                                                                                                                                 dirhodium tetraacetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 1.17h,
                                                                                                                以70%的产率得到methyl (1R,3S,6S,7S)-7-[tert-butyl(dimethyl)silyl]oxy-4-oxotricyclo[4.3.0.01,3]nonane-3-carboxylate