1-O-(2-benzyloxycarbonylamido-3-chloroacetyl-2-deoxy-4:6-O-ethylidene-β-D-glucopyranosyl)-<(+)-4'-O-chloroacetyl-1-epipodophyllotoxin> 在
zinc diacetate 作用下,
以
甲醇 为溶剂,
生成 {(2S,4aS,6S,7S,8S,8aR)-8-Hydroxy-6-[(5R,5aS,8aS,9S)-9-(4-hydroxy-3,5-dimethoxy-phenyl)-8-oxo-5,5a,6,8,8a,9-hexahydro-furo[3',4':6,7]naphtho[2,3-d][1,3]dioxol-5-yloxy]-2-methyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl}-carbamic acid benzyl ester