Acetic acid (3S,6S)-3-azido-6-[(2,4-dinitro-phenylamino)-methyl]-tetrahydro-pyran-2-yl ester   、                                                                                      (3aR,4S,6S,7R,7aR)-6-azido-7-hydroxy-4-methoxy-3-methyl-3a,4,5,6,7,7a-hexahydro-1,3-benzoxazol-2-one                                                                                                                                                              在
                                                                                                                                                                                 
三氟甲磺酸三甲基硅酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以48%的产率得到4-azido-3-O-<2'-azido-2',3',4',6'-tetradeoxy-6'-(2,4-dinitrophenylamino)-α-D-threo-hexopyranosyl>-1-N,2-O-carbonyl-1,4,5-trideoxy-6-O-methyl-1-(methylamino)-L-chiro-inositol