N-芴甲氧羰基-L-丝氨酸五氟苯基酯   、                                                                                      
2,3,6-Tri-O-acetyl-4-O-(2,3,4-tri-O-acetyl-α-D-fucopyranosyl)-β-D-galactopyranosyl trichloroacetimidate                                                                                                                                                              在
                                                                                                                                                                                 3 A molecular sieve   、                                                                                                  
silver trifluoromethanesulfonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                生成                                                 3,6-Di-O-acetyl-4-O-(2,3,4-tri-O-acetyl-α-D-fucopyranosyl)-α-D-galactopyranose-1,2-diyl N
α-(fluoren-9-ylmethoxycarbonyl)-L-alanin-3-yl orthoacetate pentafluorophenyl ester