C
69H
57Cl
8NO
22 在
对甲苯磺酸 作用下,
以
2,2-二甲氧基丙烷 为溶剂,
反应 2.0h,
以75%的产率得到[(2R,3R,4S,5R,6R)-3-[(2S,3R,4S,5S,6R)-4-[[(4aR,6S,7R,8R,8aS)-8-hydroxy-2,2-dimethyl-7-[(2,2,2-trichloroacetyl)amino]-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy]-5-benzoyloxy-3-(4-chlorobenzoyl)oxy-6-[(4-chlorobenzoyl)oxymethyl]oxan-2-yl]oxy-4,5-bis[(4-chlorobenzoyl)oxy]-6-phenylmethoxyoxan-2-yl]methyl 4-chlorobenzoate