Macrocyclic bis-urea receptor: Synthesis, crystal structure and phosphate binding properties
作者:Xi Shu、Ruyu Wang、Yu Fan、Shoujian Li、Chao Huang
DOI:10.1016/j.tetlet.2019.02.004
日期:2019.3
A macrocyclic bis-urea receptor (L1) and two acyclic bis-urea analogues (L2 and L3) have been synthesized. The crystal structure of L1 was obtained. The experimental results show that the receptor L1 has high selectivity to H2PO4−. Meanwhile, compared with the acyclic receptors L2 and L3, L1 has higher binding ability to H2PO4−. The results of density functional theory (DFT) calculations deepened our
已经合成了大环双脲受体(L1)和两个无环双脲类似物(L2和L3)。获得了L1的晶体结构。实验结果表明,该受体L1具有高的选择性至H 2 PO 4 - 。同时,随着无环受体相比L2和L3,L1具有更高的结合能力与H 2 PO 4 - 。密度泛函理论(DFT)计算的结果加深了我们对L1构象稳定性及其阴离子结合特性的了解。
Formation of complexes between aza derivatives of crown ethers and primary alkylammonium salts. Part 4. Diaza-18-crown-6 derivatives
作者:Leslie C. Hodgkinson、Martin R. Johnson、Stephen J. Leigh、Neil Spencer、Ian O. Sutherland、Roger F. Newton
DOI:10.1039/p19790002193
日期:——
dibenzo-18-crown-6 (9b) form strong complexes in methylene chloride with primaryalkylammonium thiocyanates. The n.m.r. spectra of these complexes show temperature dependence which can be explained in the terms of different types of guest exchange processes. The complexes of the dibenzo-18-crown-6 analogue (9b) appear to exist in one form only but the spectra of the complexes of the other 18-crown-6 analogues
Dibenzotetraaza Crown Ethers: A New Family of Crown Ethers Based on <i>o</i>-Phenylenediamine
作者:Sven H. Hausner、Cynthia A. F. Striley、Jeanette A. Krause-Bauer、Hans Zimmer
DOI:10.1021/jo050281z
日期:2005.7.1
benzimidizoles were used to produce DBTA crownethers with modified substituents and ether bridges, as well as benzimidazolidine crownethers. The synthetic approach presented here proved to be a convenient route to a new family of crownethers with overall yields of up to 48% based on the benzimidazole. Yields for the ring-closing step were generally high, ranging from 51% to 94%, without the need for high-dilution
Synthesis and extraction properties of some lariat ethers derived from the spontaneously resolved guaifenesin, 3-(2-methoxyphenoxy)propane-1,2-diol
作者:Zemfira A. Bredikhina、Rimma M. Eliseenkova、Robert R. Fayzullin、Viktorina G. Novikova、Sergey V. Kharlamov、Dilyara R. Sharafutdinova、Shamil K. Latypov、Alexander A. Bredikhin
DOI:10.3998/ark.5550190.0012.a02
日期:——
Capable of spontaneous resolution rac-3-(2-methoxyphenoxy)propane-1,2-diol, guaifenesin 1 has been proposed as a cheap and readily available enantiopure precursor for the synthesis of nonracemic crown ethers having ligating OAr and OMe arms (lariatethers). The crowns studied failed to form stable host/guest complexes with amine hydrochloride salts; the effective complexation was achieved using hexafluorophosphate
Synthesis and Evaluation of Bis-Thiazolium Salts as Potential Antimalarial Drugs
作者:Sergio A. Caldarelli、Jean-Frédéric Duckert、Sharon Wein、Michèle Calas、Christian Périgaud、Henri Vial、Suzanne Peyrottes
DOI:10.1002/cmdc.201000097
日期:——
the structural requirements of the linker that lead to more rigid analogues with fewer rotatable bonds but which retain antimalarial activity, a new series of compounds incorporating an aryl moiety and eventually oxygen atoms were prepared, and their biological activity was evaluated. Structure–activity relationships suggest that the optimal linker construct is an aromatic group with two n‐butyl chains