New Synthetic Routes to Chain-Extended Selenium, Sulfur, and Nitrogen Analogues of the Naturally Occurring Glucosidase Inhibitor Salacinol and their Inhibitory Activities against Recombinant Human Maltase Glucoamylase
作者:Hui Liu、Ravindranath Nasi、Kumarasamy Jayakanthan、Lyann Sim、Heather Heipel、David R. Rose、B. Mario Pinto
DOI:10.1021/jo071045m
日期:2007.8.1
Six heteroanalogues (X = S, Se, NH) of the naturally occurring glucosidase inhibitor salacinol, containing polyhydroxylated, acyclic chains of 6-carbons, were synthesized for structure−activity studies with different glycosidase enzymes. The target zwitterionic compounds were synthesized by means of nucleophilic attack of the PMB-protected 1,4-anhydro-4-seleno-, 1,4-anhydro-4-thio-, and 1,4-anhydr
天然存在的葡糖苷酶抑制剂salacinol的六种杂类似物(X = S,Se,NH),含有多羟基化的6碳原子的无环链,是用不同的糖苷酶进行结构活性研究的。目标两性离子化合物是由PMB保护的1,4-脱水-4-硒代的亲核攻击的方法合成,1,4-脱水-4-硫代,和1,4-脱水-4-亚氨基d -阿拉伯糖醇在1,3-环硫酸盐的受阻最少的碳原子上。这些1,3-环硫酸盐衍生自d-葡萄糖和d-半乳糖,并且明显地,它们利用丁烷二缩醛作为反式的保护基。2,3-赤道位置。与先前使用不同保护基进行的尝试不同,偶联产物的脱保护进行得很顺利,并在立体生成中心获得了具有不同立体化学的目标硒,sulf和硫酸铵。四种新的杂取代化合物(X = Se,NH)抑制了重组人麦芽糖酶葡糖淀粉酶(MGA),后者是与小肠中葡萄糖寡糖分解有关的关键肠酶之一。这两种硒衍生物各自的K i值为0.10μM,这是两性离子糖苷酶抑制剂这一一般系列中迄