Discovery of Diphenoxy Derivatives with Flexible Linkers as Ligands for β-Amyloid Plaques
作者:Jianhua Jia、Longfei Zhang、Jia Song、Jiapei Dai、Mengchao Cui
DOI:10.1021/acs.molpharmaceut.0c00537
日期:2020.11.2
analysis revealed that modification on the linkers or substituents tolerated great flexibility, which challenged the long-held belief that rigid and planar structures are exclusively favored for Aβ binding. Three ligands were labeled by iodine-125, and they exhibited good properties in vitro and in vivo, which further supported that this flexiblescaffold was potential and promising for the development
respectively. A significant improvement in the bindingaffinity over the monomer, compounds 9-12 or benzyldiamine derivatives, demonstrated the applicability of the multidentate approach. The underlying mechanism of these novel Aβ agents was explored by molecular docking technique, which theoretically verified the highaffinities of the multidentate benzyldiamine derivatives for Aβ aggregates. Moreover, the molecular
Mn(III)-Schiff base complexes, the biomimetic catalyticoxidation of styrene to benzaldehyde was carried out with 100% selectivity. Comparison of this complex with analogues not containing a crown ether moiety clearly demonstrated the influence of crown ether ring on the dioxygen affinities and biomimetic catalyticoxidationperformance of the Schiff base complexes.
合成了含有冠醚环(HL 1,HL 2,HL 3和HL 4)的单席夫碱及其过渡金属配合物,并通过1 H NMR,IR和质谱以及元素分析对其进行了表征。在-5至+25°C的范围内测量席夫碱-Co(II)配合物的氧合常数(K ),并基于这些K来计算ΔH°和ΔS°的值价值观。使用Mn(III)-席夫碱配合物,以100%的选择性将苯乙烯仿生催化氧化为苯甲醛。该配合物与不含冠醚部分的类似物的比较清楚地证明了冠醚环对席夫碱配合物的双氧亲和力和仿生催化氧化性能的影响。