Synthesis and enantiomeric recognition ability of 22-crown-6 ethers derived from rosin acid and BINOL
作者:Hengshan Wang、Xiaoyan Tian、Da Yang、Yingming Pan、Qiang Wu、Chunhuan He
DOI:10.1016/j.tetasy.2011.02.014
日期:2011.2
Four novel chiral 22-crown-6 ethers 6a–b, 7a–b bearing hydroxyl side groups derivedfrom rosin acid and BINOL were prepared in optically pure forms, and their enantiodiscriminating abilities towards protonated primary amines and amino acid methyl ester salts were examined by UV–vis titration methods. These receptors exhibited good chiral recognition towards the isomers (up to KD/KL = 6.02, ΔΔG0 = 4
Stereochemically active lead chloride enantiomers mediated by homochiral organic cation
作者:Li-Li Zhu、Yue-E. Huang、Yang-Peng Lin、Xiao-Ying Huang、Hai-Qing Liu、David B. Mitzi、Ke-Zhao Du
DOI:10.1016/j.poly.2018.11.026
日期:2019.1
Two-dimensional ((S)-1-(1-naphthyl)ethylamineH)(2)Pb4Cl10 center dot 2DMF (1) and ((R)-1-(1-naphthyl)ethylamineH)(2)Pb4Cl10 center dot 2DMF (2) have been synthesized using the corresponding homochiral organic cations. The lead atoms within the structure adopt a variety of coordination geometries, with Pb(II)Cl-6 adopting a distorted pentagonal pyramid geometry and exhibiting stereochemically active lone-pair electrons, instead of a more typical octahedral geometry with less stereochemical activity. (C) 2018 Elsevier Ltd. All rights reserved.