Synthesis of Multivalent Glycoclusters from 1-Thio-β-<scp>d</scp>-galactose and Their Inhibitory Activity against the β-Galactosidase from <i>E. coli</i>
作者:Alejandro J. Cagnoni、Oscar Varela、Sébastien G. Gouin、José Kovensky、María Laura Uhrig
DOI:10.1021/jo102421e
日期:2011.5.6
to 4 residues of 1-thio-β-d-galactose. The yields went from moderate to excellent, depending on the valency of the desired product. Deacetylation with Et3N/MeOH/H2O led to the final products. Complete characterization of the products was performed by NMR spectroscopy and HR-MS techniques. Their activities as inhibitors of β-galactosidasefrom E. coli were determined by using the Lineweaver−Burk method
据报道,旨在与生物系统相容的多价糖簇的合成。已经合成了各种通过可变长度的低聚乙二醇链连接至末端三键的1-硫代-β- d-半乳糖苷。另外,通过用NaN 3 / PPh 3 / CBr 4直接叠氮化由海藻糖,麦芽糖和麦芽三糖制备含叠氮化物的寡糖支架。硫代半乳糖苷残基和叠氮化物支架之间在微波辐射下的点击反应提供了含有1-4个1-硫代-β- d-半乳糖残基的糖簇家族。取决于所需产品的化合价,收率从中等提高到极好。用Et脱乙酰3 N / MeOH / H 2 O生成最终产物。通过NMR光谱和HR-MS技术对产物进行完全表征。通过使用Lineweaver-Burk方法确定了它们作为大肠杆菌β-半乳糖苷酶抑制剂的活性。使用亲水性碳水化合物支架合成多价半乳糖苷代表了一种改善其药代动力学和生物利用度的有趣方法。另外,硫糖苷键的存在将改善它们在生物流体中的稳定性。