Synthesis and binding affinity analysis of positional thiol analogs of mannopyranose for the elucidation of sulfur in different position
作者:Bin Wu、Jiantao Ge、Bo Ren、Zhichao Pei、Hai Dong
DOI:10.1016/j.tet.2015.04.060
日期:2015.6
serial inversion was successfully applied in the efficient synthesis of 2-thio- or 2,4-di-thio-mannoside derivatives. The protein recognition properties of the synthesized positional thiol analogs of mannose were then evaluated in a competition binding assay with the model lectin Concanavalin A (Con A), in order to investigate the roles of thiol group in the different position of the mannopyranose ring
提出了合成硫代-α/β- d-甘露糖衍生物的途径。双平行或双串联反转成功地用于2-硫-或2,4-二硫-甘露糖苷衍生物的有效合成。然后在竞争性结合测定中使用模型凝集素伴刀豆球蛋白A(Con A)评估了甘露糖合成的位置硫醇类似物的蛋白质识别特性,以研究巯基吡喃糖环在结合中不同位置的硫醇基团的作用亲和力。尽管甲基α- d-甘露糖苷环中的氧原子被硫原子取代通常对Con A的结合亲和力很低或没有结合力,但令人惊讶的发现是甲基2-硫代-α- d-mannoside显示高四倍抑制除甲基α- d -mannoside,表明为α-变形例2位上的特殊重要性d -mannoside。3-硫代α- d-甘露糖苷甲基也显示出对Con A的抑制作用,表明在C-3位置的O原子在结合位点上的重要性较小。