methyl 4,6-O-benzylidene-2-(benzyloxycarbonyl)amino-2-deoxy-α-D-glucopyranoside 、
3,4,6-tri-O-acetyl-2-deoxy-2-(2,4-dinitroanilino)-α-D-glucopyranosyl bromide 在
2,4,6-三甲基吡啶 、 silver perchlorate 作用下,
以
1,4-二氧六环 、
苯 为溶剂,
反应 0.5h,
以88%的产率得到Acetic acid (2R,3S,4R,5R,6S)-3-acetoxy-2-acetoxymethyl-6-((4aR,6S,7R,8R,8aS)-7-benzyloxycarbonylamino-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yloxy)-5-(2,4-dinitro-phenylamino)-tetrahydro-pyran-4-yl ester