Mesure des valeurs des constantes de stabilite。Les ethers monomethyliques desglycos semblent etre legerement meilleurs complexants des alcalins que les glymes 通讯员
New supramolecular hosts: Synthesis and cation binding studies of novel Tröger's base-crown ether composites
作者:Alla Manjula、Madhavarao Nagarajan
DOI:10.1016/s0040-4020(97)00759-x
日期:1997.8
A simple and straightforward synthesis of a novel class of supramolecular hosts containing the Tröger's base moiety is reported. The cationbinding properties of these macrocycles were investigated using Cram's picrate extraction method.
balls (MBs), enabling transmembrane ion transport selectivity to be custom designable. The modularly tunable MBm-Cn (m = 4-7; n = 6-12) structures consist of a C60-fullerene core, flexible alkyl linkers Cn (i.e., C6 for n-C6H12 group), and peripherally aligned benzo-3m-crown-m ethers (i.e., m = 4 for benzo-12-crown-4) as ion-transporting units. Screening a matrix of 16 such MBs, combinatorially derived
In an embodiment, a novel DNA-interactive compound is formed by coupling an alkali metal ion binding moiety with a DNA interactive moiety. An alkali metal ion binding moiety is any group capable of binding alkali metal ions (e.g., lithium, sodium, potassium, etc.). The DNA-interactive moiety is a group of atoms or functionality capable of covalently modifying DNA, through, for example, alkylation, cleavage, metalation, hydrolysis, or crosslinking.
Design and Synthesis of a New Class of Nonmacrocyclic Alkali Metal Host Compounds
作者:Glenn J. McGarvey、Marshall W. Stepanian、Andrew R. Bressette、Michal Sabat
DOI:10.1021/ol006468o
日期:2000.11.1
A newclass of nonmacrocyclic metal ion hosts has been examined that features a polyspirocyclic framework that offers a 1,3,5-triaxial presentation of ligating centers. These compounds are easily synthesized and exploit stereoelectronic influences to preorganize the metal ion binding site. While compounds bearing oxygen substituents (X = OH, OMe) failed to show appreciable binding of alkali metals
Synthesis, binding properties and theoretical studies of p-tert-butylhexahomotrioxacalix[3]arene tri(adamantyl)ketone with alkali, alkaline earth, transition, heavy metal and lanthanide cations
作者:Paula M. Marcos、José R. Ascenso、Manuel A.P. Segurado、Raul J. Bernardino、Peter J. Cragg
DOI:10.1016/j.tet.2008.11.005
日期:2009.1
first time. Compound 1b was obtained in a cone conformation in solution at room temperature, as established by NMR spectroscopy (1H and 13C). The binding properties of ligand 1b for alkali, alkalineearth, transition, heavy metal and lanthanide cations have been assessed by phase transfer and proton NMR titration experiments. Molecular mechanics and ab initio techniques were also employed to complement
p -叔-Butylhexahomotrioxacalix [3]芳烃三(金刚烷基)酮(1B)中的溶液首次合成。如通过NMR光谱法(1 H和13 C)所确定的,在室温下在溶液中以圆锥构象获得化合物1b。已通过相转移和质子NMR滴定实验评估了配体1b对碱金属,碱土金属,过渡金属,重金属和镧系元素阳离子的结合性能。还采用了分子力学和从头算技术来补充NMR数据。将结果与使用其他密切相关的高草酸呋喃芳烃衍生物获得的结果进行比较。虽然三酮1b是一种弱萃取剂,对Na +表现出很强的峰选择性,对Ag +也有一定的偏爱。质子NMR滴定表明1b与所研究的阳离子之间形成1:1的络合物,而且它们应位于由苯氧基和羰基氧原子限定的空腔内。尽管分子力学结果与NMR数据几乎没有相关性,但从头算模型却获得了很好的一致性。