(2-amino-3,4-di-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-[tert-butyl (2,3-di-O-benzyl-N-benzyloxycarbonyl-1,5-dideoxy-1,5-imino-L-iditol)uronate]   、                                                                                      
乙酸酐                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                                                            以96%的产率得到(2-acetamido-6-O-acetyl-3,4-di-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-[tert-butyl (2,3-di-O-benzyl-N-benzyloxycarbonyl-1,5-dideoxy-1,5-imino-L-iditol)uronate]