methyl (S)-2-[(R)-1-tert-butoxycarbonyl-5-oxopyrrolidin-2-yl]-2-[(S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-hydroxyacetate                                                                                                                                                              在
                                                                                                                                                                                 ammonium cerium (IV) nitrate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以90%的产率得到methyl (S)-2-[(S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-hydroxy-2-[(R)-5-oxopyrrolidin-2-yl]acetate