4'-acetoxy-6-C-(2,3,4-tri-O-acetyl-β-D-xylopyranosyl)-5,7-dihydroxyflavan 、 2,3,4-tri-O-acetyl-α/β-L-arabinopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以80%的产率得到4'-acetoxy-6-C-(tri-O-acetyl-β-D-xylopyranosyl)-8-C-(tri-O-acetyl-α-L-arabinopyranosyl)-5,7-dihydroxyflavan