4',8-Dihydroxyisoflavon-7-yl alpha-D-arabinofuranoside 1 (A-76202), which i
s a strong alpha-glucosidase I and II inhibitor, was synthesized by the gly
cosylation of 2,3,5-tri-O-benzyl-alpha-D-arabinofuranosyl bromide 2 and the
lithium salt of 4',8-diallyloxy-7-hydroxyisoflavone 4, and successive depr
otection of allyl groups and benzoyl esters of the glycosylated product 5.
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