t-butyl (1RS,5SR,7RS,8SR)-8-ethoxycarbonyl-8-methylsulphonyloxy-3-oxo-2-oxa-6-azabicyclo<3.3.0>octane-7-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
lead(IV) acetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以47%的产率得到t-butyl (1RS,5SR,8SR)-8-ethoxycarbonyl-8-methylsulphonyloxy-3-oxo-2-oxa-6-azabicyclo<3.3.0>oct-6-ene-7-carboxylate