2-O-acetyl-4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl chloride   、                                                                                      
octyl 2,3,4-tri-O-benzyl-β-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 molecular sieve   、                                                                                                  
silver trifluoromethanesulfonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以67.6%的产率得到Acetic acid (2S,3S,4S,5R,6R)-5-azido-4-benzyloxy-6-methyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-octyloxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-3-yl ester