5-O-allyl-2,3,4-tri-O-benzyl-1-O-(2-azido-4-O-benzyl-6-O-tert-butyl-diphenylsilyl-2-deoxy-β-D-galactopyranosyl)-D-ribitol 、
[(3R,4R,5R,6R)-3-azido-5-[(2R,3R,4S,5S,6R)-3-azido-6-methyl-5-(phenylmethoxycarbonylamino)-4-[(2R,3R,4S,5R,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-4-phenylmethoxyoxan-2-yl] 2,2,2-trichloroethanimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以89%的产率得到5-O-allyl-2,3,4-tri-O-benzyl-1-O-[(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-(1->3)-(2-azido-4-benzyloxycarbonylamino-2,4,6-trideoxy-α-D-galactopyranosyl)-(1->4)-(2-azido-3-O-benzyl-6-O-tert-butyl-diphenylsilyl-2-deoxy-α-D-galactopyranosyl)-(1->3)-(2-azido-4-O-benzyl-6-O-tert-butyl-diphenylsilyl-2-deoxy-β-D-galactopyranosyl)]-D-ribitol