methyl (2R,4S,5R,6R)-5-acetamido-4-acetyloxy-6-[(S)-hydroxy-[(4R)-2-phenyl-1,3-dioxolan-4-yl]methyl]-2-prop-2-enoxyoxane-2-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
D(+)-10-樟脑磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 3.5h,
                                                                                                                以26%的产率得到methyl (2R,4S,5R,6R)-5-acetamido-4-acetyloxy-6-[(2R,4R,5R)-5-hydroxy-2-phenyl-1,3-dioxan-4-yl]-2-prop-2-enoxyoxane-2-carboxylate