methyl 4,6-O-cyclohexylidene-2-O-p-methoxybenzyl-3-O-tert-butyldiphenylsilyl-1-thio-α-D-mannopyranoside 、
2-((2S,3R,4R,5S,6R)-4-(benzyloxy)-6-((benzyloxy)methyl)-2-(((2R,3S,4R,5R,6R)-4,6-bis(benzyloxy)-5-(1,3-dioxoisoindolin-2-yl)-2-((4-methoxyphenoxy)methyl)tetrahydro-2H-pyran-3-yl)oxy)-5-hydroxytetrahydro-2H-pyran-3-yl)isoindoline-1,3-dione 在
4 A molecular sieve 、
2,3-二氯-5,6-二氰基-1,4-苯醌 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
生成 2-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4R,5S,6R)-5-[(S)-[(4aR,6R,7S,8S,8aR)-8-[tert-butyl(diphenyl)silyl]oxy-6-methylsulfanylspiro[4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2,1'-cyclohexane]-7-yl]oxy-(4-methoxyphenyl)methoxy]-3-(1,3-dioxoisoindol-2-yl)-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-2-yl]oxy-6-[(4-methoxyphenoxy)methyl]-2,4-bis(phenylmethoxy)oxan-3-yl]isoindole-1,3-dione