Synthesis of α- and β-d-glucopyranosyl triazoles by CuAAC ‘click chemistry’: reactant tolerance, reaction rate, product structure and glucosidase inhibitory properties
作者:Simone Dedola、David L. Hughes、Sergey A. Nepogodiev、Martin Rejzek、Robert A. Field
DOI:10.1016/j.carres.2010.03.041
日期:2010.6
cycloaddition (CuAAC) 'click chemistry' was used to assemble a library of 21 alpha-D- and beta-D-glucopyranosyl triazoles, which were assessed as potential glycosidase inhibitors. In the course of this work, different reactivities of isomeric alpha- and beta-glucopyranosyl azides under CuAAC conditions were noted. This difference was further investigated using competition reactions and rationalised on the
Cu(I) 催化的叠氮化物炔烃 1,3-偶极环加成 (CuAAC)“点击化学”用于组装 21 种 α-D-和β-D-吡喃葡萄糖基三唑的库,它们被评估为潜在的糖苷酶抑制剂。在这项工作的过程中,注意到了在 CuAAC 条件下异构 α-和β-吡喃葡萄糖基叠氮化物的不同反应性。使用竞争反应进一步研究了这种差异,并在 X 射线晶体学数据的基础上进行了合理化,这揭示了 α-和 β-端基异构体的叠氮基团内键长的显着差异。结构研究还表明,在固态α-和β-葡糖基三唑中,糖和三唑环倾向于垂直取向。测定了三唑库对甜杏仁β-葡萄糖苷酶(GH1) 和酵母α-葡萄糖苷酶(GH13) 的抑制作用,从而确定了一组在100 microM 范围内有效的葡萄糖苷酶抑制剂。正如预期的那样,对一种酶的抑制优先于另一种酶被证明取决于抑制剂的异头构型。