[(2R,3S,4R,5R,6R)-3-benzoyloxy-4-hydroxy-6-(naphthalen-2-ylmethoxy)-5-(2,2,2-trichloroethoxycarbonylamino)oxan-2-yl]methyl benzoate   、                                                                                      
methyl (2S,3S,4S,5R,6R)-3,5-dibenzoyloxy-4-methoxy-6-(2,2,2-trichloroethanimidoyl)oxyoxane-2-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以83%的产率得到methyl (2S,3S,4S,5R,6R)-3,5-dibenzoyloxy-6-[(2R,3S,4R,5R,6R)-3-benzoyloxy-2-(benzoyloxymethyl)-6-(naphthalen-2-ylmethoxy)-5-(2,2,2-trichloroethoxycarbonylamino)oxan-4-yl]oxy-4-methoxyoxane-2-carboxylate