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