methyl 3,4,6-tri-O-benzyl-α-D-mannopyranoside 、
6-O-acetyl-2,3,4-tri-O-benzyl-α-D-mannopyranosyl bromide 在
silver zeolite 作用下,
以
甲苯 为溶剂,
以21%的产率得到Acetic acid (2R,3R,4S,5S,6R)-3,4,5-tris-benzyloxy-6-((2S,3S,4S,5R,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-2-methoxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-2-ylmethyl ester