2,3,4-tri-O-acetyl-D-arabinopyranosyl trichloroacetimidate 、
4'-acetoxy-6-C-(2,3,4-tri-O-acetyl-α-D-arabinopyranosyl)-5,7-dihydroxyflavan 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以70%的产率得到4'-acetoxy-6,8-di-C-(2,3,4-tri-O-acetyl-α-D-arabinopyranosyl)-5,7-dihydroxyflavan