methyl 4,6-O-benzylidene-3-tert-butoxycarbonylamino-3-C-tert-butoxycarbonylaminomethyl-2,3-dideoxy-α-D-arabino-hexopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
N-溴代丁二酰亚胺(NBS)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氯化碳                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以100%的产率得到methyl 4-O-benzoyl-6-bromo-3-tert-butoxycarbonylamino-3-C-tert-butoxycarbonylaminomethyl-2,3,6-trideoxy-α-D-arabino-hexopyranoside