3,4,6-Tri-O-benzoyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranosyl trichloroacetimidate 、
Nα-(fluoren-9-ylmethoxycarbonyl)-O-(2-azido-2-deoxy-3,4-O-isopropylidene-α-D-galactopyranosyl)-L-threonine tert-butyl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
1,2-二氯乙烷 为溶剂,
以81%的产率得到N
α-(fluoren-9-ylmethoxycarbonyl)-O-[O-[3',4',6'-tri-O-benzoyl-2'-deoxy-2'-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranosyl]-(1'->6)-2-azido-2-deoxy-3,4-O-isopropylidene-α-D-galactopyranosyl)-L-threonine tert-butyl ester