N-(3,7,10,13-tetraoxapentadec-14-ynyl)maleimide 、 (2S,3R,4S,5S,6S)-2-(2-azido-4-((((((1R,13aR)-1-(bromomethyl)-12-hydroxy-7,13a-dimethoxy-5-methyl-1-(((2-(methylsulfonyl)ethyl)(((4-(((2S,3R,4S,5S,6S)-3,4,5-triacetoxy-6-(methoxycarbonyl)tetrahydro-2H-pyran-2-yl)oxy)benzyl)oxy)carbonyl)amino)methoxy)-11-oxo-1,3a,4,8,9,10,11,13a-octahydro-2H-2,4-epoxyfuro[3,2-b]naphtho[2,3-h]chromen-2-yl)methyl)carbamoyl)oxy)methyl)phenoxy)-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate 在
lithium hydroxide 、 copper(II) sulfate 、
sodium ascorbate 作用下,
以
甲醇 、
乙腈 、
水 、
二甲基亚砜 为溶剂,
以100 %的产率得到(2S,3S,4S,5R,6S)-6-(4-((((((1R,13aR)-1-(bromomethyl)-1-(((((4-(((2S,3R,4S,5S,6S)-6-carboxy-3,4,5-trihydroxytetrahydro-2H-pyran-2-yl)oxy)benzyl)oxy)carbonyl)(2-(methylsulfonyl)ethyl)amino)methoxy)-12-hydroxy-7,13a-dimethoxy-5-methyl-11-oxo-1,3a,4,8,9,10,11,13a-octahydro-2H-2,4-epoxyfuro[3,2-b]naphtho[2,3-h]chromen-2-yl)methyl)carbamoyl)oxy)methyl)-2-(4-(13-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2,5,8,11-tetraoxatridecyl)-1H-1,2,3-triazol-1-yl)phenoxy)-3,4,5-trihydroxytetrahydro-2H-pyran-2-carboxylic acid