This paper describes the synthesis of three closely related families of mannopyranoside-containing dendrimers for the purpose of studying subtle structural parameters involved in the measurements of multivalent carbohydrate–protein binding interactions. Toward this goal, two trimers 5 and 9, three 9-mers 12, 17, 21, and one 27-mer 23, varying by the number of atoms separating the anomeric and the core carbons, were synthesized using azide–alkyne cycloaddition (CuAAc). Compound 23 was prepared by an efficient convergent strategy. The sugar precursors consisted of either a 2-azidoethyl (3) or a prop-2-ynyl α-D-mannopyranoside (7) derivative. The solvodynamic diameters of 9-mer 12, 17, and 21 were determined by pulsed-field-gradient-stimulated echo (PFG-STE) NMR experiments and were found to be 3.0, 2.5, and 3.4 nm, respectively.
本文描述了合成三个紧密相关的含
甘露聚糖基团的树枝状聚合物家族,以研究多价
碳水化合物-蛋白质结合相互作用中涉及的微妙结构参数。为实现这一目标,使用偶联加成反应(Cu
AAc)合成了两个三聚体5和9,三个九聚体12、17、21以及一个27聚体23,其间隔异构体和核心碳原子数量不同。化合物23通过高效的聚合策略制备。糖前体包括2-
叠氮乙基(3)或丙-2-炔基α-D-
甘露聚糖(7)衍
生物。通过脉冲场梯度激发回波(PFG-STE)核磁共振实验测定了9聚体12、17和21的溶剂动力学直径,分别为3.0、2.5和3.4纳米。