((2R,3S,4R,5R,6S)-6-(allyloxy)-4-(benzoyloxy)-5-(((benzyloxy)carbonyl)amino)-3-((methylsulfonyl)oxy)tetrahydro-2H-pyran-2-yl)methyl benzoate                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                                                        以93%的产率得到((1R,2R,4S,5R,6R)-4-Allyloxy-2-hydroxymethyl-3,7-dioxa-bicyclo[4.1.0]hept-5-yl)-carbamic acid benzyl ester