Synthesis of New Aza-C-disaccharides Linking 4-Deoxy-4-amino-β-L-erythro-furanose to C-2 ofD-Glucose andD-Allose
作者:Eliazar Rodríguez García、Margaret A. Brimble、Pierre Vogel
DOI:10.1002/ejoc.200600199
日期:2006.9
that were converted into the aza-C-disaccharides (+)-4 [methyl 2-deoxy-2-(1,2,5-trideoxy-2,5-imino-L-ribitol-1C-yl)-α-D-glucopyranoside] and (+)-5 (the α-D-allopyranoside analogue). Reduction of the aldol and deprotection provided aza-C-disaccharide (+)-3 methyl 2-deoxy-2-[(1R or 1S)-2,5-dideoxy-2,5-imino-L-ribitol-1C-yl]-α-D-allopyranoside} with a hydroxymethano linker. (© Wiley-VCH Verlag GmbH &
N-benzyl-2,5-dideoxy-2,5-imino-3,4-O-isopropylidene-L-ribose 与 4,6-O-benzylidene-2-deoxy-α-D-的交叉羟醛缩合erythro-hexopyranosid-3-ulose(烯醇钾 + HMPA)得到作为主要产物的醛醇。DAST 诱导的水消除产生两个烯酮,它们被转化为氮杂-C-二糖 (+)-4 [甲基 2-脱氧-2-(1,2,5-trideoxy-2,5-imino-L-ribitol- 1C-基)-α-D-吡喃葡萄糖苷]和(+)-5(α-D-别吡喃糖苷类似物)。醛醇的还原和脱保护提供氮杂-C-二糖 (+)-3 methyl 2-deoxy-2-[(1R or 1S)-2,5-dideoxy-2,5-imino-L-ribitol-1C- yl]-α-D-别吡喃糖苷}与羟基甲烷连接基。(© Wiley-VCH