((2R,3S,4R,5R,6S)-6-((2R,3R,4S,5S,6R)-2-(5-(benzyl(benzyloxycarbonyl)amino)pS33entyloxy)-3,5-bis(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-4-yloxy)-3-(benzyloxy)-4-hydroxy-5-((2,2,2-trichloroethoxy)carbonylamino)tetrahydro-2H-pyran-2-yl)methyl acetate 、 (3aR,4R,6S,7aS)-methyl 6-((2R,3S,4S,5R,6S)-3-((2S,3R,4R,5S,6R)-6-(acetoxy methyl)-5-(benzyloxy)-4-(tert-butyldimethylsilyloxy)-3-((2,2,2-trichloroethoxy)carbonylamino)tetrahydro-2H-pyran-2-yloxy)-5-(benzoyloxy)-2-(benzyloxymethyl)-6-(p-tolylthio)tetrahydro-2H-pyran-4-yloxy)-4-((4S,5R)-5-(benzyloxymethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)-2-oxohexahydro-2H-pyrano[3,4-d]oxazole-6-carboxylate 在
N-碘代丁二酰亚胺 、
叔丁基二甲硅基三氟甲磺酸酯 作用下,
以
二氯甲烷 为溶剂,
反应 8.0h,
以67%的产率得到(3aR,4R,6S,7aS)-methyl 6-((2R,3S,4S,5R,6R)-3-((2S,3R,4R,5S,6R)-6-(acetoxy methyl)-5-(benzyloxy)-4-(tert-butyldimethylsilyloxy)-3-((2,2,2-trichloroethoxy)carbonylamino)tetrahydro-2H-pyran-2-yloxy)-6-((2R,3S,4R,5R,6S)-2-(acetoxymethyl)-6-((2R,3R,4S,5S,6R)-2-(5-(benzyl(benzyloxycarbonyl)amino)pentyloxy)-3,5-bis(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-4-yloxy)-3-(benzyloxy)-5-((2,2,2-trichloroethoxy)carbonylamino)tetrahydro-2H-pyran-4-yloxy)-5-(benzoyloxy)-2-(benzyloxymethyl)tetrahydro-2H-pyran-4-yloxy)-4-((4S,5R)-5-(benzyloxymethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)-2-oxohexahydro-2H-pyrano[3,4-d]oxazole-6-carboxylate