Comparison of diffusion coefficients for matched pairs of macrocyclic and linear molecules over a drug-like molecular weight range
作者:Andrew R. Bogdan、Nichola L. Davies、Keith James
DOI:10.1039/c1ob05996c
日期:——
The diffusion coefficients of a series of closely matched pairs of macrocyclic and linear molecules have been compared using NMR spectroscopy. The macrocyclic series was designed both to overlap with and extend beyond the molecular weight range typically employed for drug-like molecules. The linear molecules each represent a carbogenic fission of their macrocyclic counterparts, designed to minimize differences in functionality and physicochemical properties. Each series of molecules was prepared using copper catalyzed azide-alkyne cycloaddition (CuAAC) reactions conducted in a flow using a copper tube. The macrocyclic series exhibited consistently higher diffusion across the entire molecular weight range studied. The fold difference in diffusion coefficients between the macrocyclic and linear analogues appeared to be independent of either solvent viscosity or dielectric environment.
通过核磁共振波谱法比较了一系列紧密匹配的大环和线性分子对的扩散系数。大环系列的设计既与通常用于类药物分子的分子量范围重叠,又有所扩展。每个线性分子代表了其相应大环分子的碳解裂变,旨在最小化功能和物理化学性质的差异。每个分子系列均采用铜催化的叠氮-炔环加成(CuAAC)反应,在流动体系中使用铜管进行制备。在整个研究分子量范围内,大环系列始终展现出更高的扩散性。大环和线性类似物之间扩散系数的倍数差异似乎与溶剂粘度或介电环境无关。