Binding Studies on a Library of Induced‐Fit Synthetic Carbohydrate Receptors with Mannoside Selectivity
作者:Kalanidhi Palanichamy、M. Fernando Bravo、Milan A. Shlain、Frank Schiro、Yasir Naeem、Mateusz Marianski、Adam B. Braunschweig
DOI:10.1002/chem.201803317
日期:2018.9.18
by 1H NMR titrations in CD2Cl2 at 298 K, is reported, providing binding affinities that vary from ≈101–104 m−1. Although the receptors are promiscuous, 1 shows selectivity for β‐Man at a ratio of 103:1 β‐Man:β‐Gal, receptors 2–4 and 6 have preference for α‐Man, 5 is selective for β‐Gal, and 10 prefers α‐Glc (Man=mannose; Gal=galactose, Glc=glucose). A variety of 1D and 2D NMR, and computational techniques
合成的碳水化合物受体可以用作疾病检测,药物递送甚至治疗的试剂,但是,它们很少用于这些应用,因为它们与细胞表面不普遍存在的弱于全赤道的葡萄糖苷结合较弱。本文所用的5个不同的辛氧基吡喃糖苷,将其通过质谱法和通过测量8个受体的结合1个在CD 1 H NMR滴定2氯2在298 K,据悉,提供结合亲和力,从≈10变化1 -10 4 米- 1。尽管受体混杂,但1对β-Man的选择性为103:1β-Man:β-Gal,受体2 –4和6对α-Man有优先选择权,5对β-Gal有选择性,10对α-Glc有优先选择权(Man =甘露糖; Gal =半乳糖,Glc =葡萄糖)。各种1D和2D NMR以及计算技术被用于确定热力学结合参数(ΔH o和ΔS o)以及宿主-客体复合物的结构,表明二聚体受体10以增加的焓结合β-Man。 ,但熵罚大于1。建模第一原理表明,10 ⋅β-曼形成的包合型配合物,其中该聚糖接合的