allyl (3,4,6-tri-O-benzyl-β-D-glucopyranosyl)-(1->2)-(3,4,6-tri-O-benzyl-α-D-mannopyranosyl)-(1->2)-3,4,6-tri-O-benzyl-α-D-mannopyranoside 在
乙酸酐 、
二甲基亚砜 作用下,
生成 (2S,4S,5R,6R)-2-[(2R,3S,4S,5R,6R)-2-((2S,3S,4S,5R,6R)-2-Allyloxy-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yloxy)-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yloxy]-4,5-bis-benzyloxy-6-benzyloxymethyl-dihydro-pyran-3-one