2,3,4-tri-O-benzyl-α-L-rhamnopyranosyl chloride 、
allyl 2-O-acetyl-3,4,6-tri-O-benzyl-β-D-glucopyranoside 在
1,1,3,3-四甲基脲 作用下,
反应 0.5h,
以75%的产率得到(2S,3R,4R,5S,6S)-2-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-2-prop-2-enoxyoxan-3-yl]oxy-6-methyl-3,4,5-tris(phenylmethoxy)oxane