作者:Tony K. M. Shing、Hau M. Cheng、Wai F. Wong、Connie S. K. Kwong、Jianmei Li、Clara B. S. Lau、Po Sing Leung、Christopher H. K. Cheng
DOI:10.1021/ol8010503
日期:2008.7.17
A pseudo-1,4'- N-linked disaccharide, pseudoacarviosin 5, was constructed via a key palladium-catalyzed coupling reaction of pseudoglycosyl chloride 8 (prepared from d-glucose via a novel direct intramolecular aldol addition in 12 steps) and pseudo-4-amino-4,6-dideoxy-alpha- d-glucose 9 (prepared from l-arabinose via an unusual trans-fused isoxazolidine-selective intramolecular nitrone-alkene cycloaddition
伪1,4'-N-连接的二糖伪拟紫薇香素5是通过钯在关键的钯催化的拟糖基氯8的偶联反应(由d-葡萄糖通过12步新颖的直接分子内羟醛加成反应制得的)和拟糖基氯构成的。 4-氨基-4,6-二脱氧-α-d-葡萄糖9(由A-阿拉伯糖通过不寻常的反式融合的异恶唑烷选择性分子内氮烯-烯烃环加成反应制备而成,共11步)。伪胡萝卜素5已被证明是α-葡糖苷酶的有效抑制剂,尤其是与血糖控制有关的肠粘膜酶蔗糖酶和葡糖淀粉酶。