methyl 2,3,5-tri-O-methyl-α-D-arabinofuranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-nitrophenylsulfonylamino)-α-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
碘苯二乙酸   、                                                                                                  
碘                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以46%的产率得到methyl 4-hydroxy-2,3,5-tri-O-methyl-α-D-arabinofuranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-nitrophenylsulfonylamino)-α-D-glucopyranoside