新型冠醚桥联手性双核Salen配合物的合成及谱学性质

Five novel chiral dinuclear Salen complexes M₂L (M = Fe³⁺Cl^-, Mn³⁺Cl^-, Co²⁺, Ni²⁺, Cu²⁺) and Ba²⁺-crown ether complex H₄BaL(ClO₄)₂ were synthesized. The complexes were synthesized by reaction between ligand 3(H₄L) and corresponding metal salts (FeCl₃, Mn(OAc)₂·4H₂O, Co(OAc)₂·4H₂O, Ni(OAc)₂·4H₂O, Cu(OAc)₂·H₂O, Ba(ClO₄)₂·2H₂O). The chiral two discrete Salen ligand 3 was condensed from 3,3′-[Oxybis(2,l-ethanediyloxy)]bis(2-hydroxybenzaldehyde) and (R,R)-1,2-diamino-cyclohexane. The structure of complexes is two discrete Salen unit bridged with crown ether from two sides. We found that ligand 3 had three complex cites. The two N₂O₂ cavities can found complexes with d-metals (compound 4), while the O₁₀ cavity can found complex with alkali metals and alkaline-earth metals (compound 5). The compounds were characterized by elemental analyses, ¹H NMR, Mass-spectra, FT-IR, UV-Vis and CD spectra. The FT-IR, UV-Vis and CD spectra property of complexes were minutely analyzed.     

超分子化学在药物共晶中的应用

药物共晶是一种新兴的药物晶型, 一个给定的活性药物分子通过形成共晶, 一方面可以大大丰富其结晶形式, 另一方面可以改善其物化性质及临床疗效. 本文从超分子化学的角度对药物共晶进行了综述, 列举了一系列通过氢键超分子合成子进行药物共晶设计和制备的研究实例, 旨在促进超分子化学和药学的交叉融合.     

手性尼莫地平绝对构型的确定和关联

概述了手性1, 4-二氢吡啶类（1, 4-DHPs）钙拮抗剂的立体化学结构及其药效与绝对构型的关系,以及尼莫地平（nimodipine）的多晶型现象。采用单晶X射线衍射与固体和溶液圆二色（ECD）光谱直接关联的方法,对自发拆分获得的一对尼莫地平外消旋聚集体进行了绝对构型确定,首次获得了手性1, 4-DHPs类化合物的固体和溶液ECD光谱图。本方法对确认有机小分子的绝对构型,以及关联系列手性1, 4-DHP衍生物的绝对构型具有重要参考价值,同时提供了有别于常规非手性方法鉴别优势手性药物晶型的有效手段。