Assembly of ion channel mimics from a modular construction set
摘要:
Ion channel mimics were assembled from a modular construction set consisting of core units, derived from polycarboxylate 18-crown-6 ethers, wall units, derived from macrocyclic tetraesters, and polar head groups which provide overall amphiphilic character. The preparation of symmetrical and side-discriminated macrocyclic tetraesters from diols and maleic anhydride gave the required macrocycles in low yields by acid-catalyzed esterification, or by carboxylate alkylation. Addition of 1 equiv of 3-mercaptopropanol to the macrocyclic dienes gave the wall unit precursor. Coupling of the walls to the crown ether via esters was achieved by carboxylate alkylation. The syntheses were completed by Michael addition of head group thiolates. Twenty-one candidate ion channels of molecular weight 1600-4800 g/mol were prepared and characterized.
Biomimetic ion transport: a functional model of a unimolecular ion channel
作者:V. E. Carmichael、P. J. Dutton、T. M. Fyles、T. D. James、J. A. Swan、M. Zojaji
DOI:10.1021/ja00184a075
日期:1989.1
Assembly of ion channel mimics from a modular construction set
作者:Thomas M. Fyles、Tony D. James、Allana Pryhitka、Mohammad Zojaji
DOI:10.1021/jo00078a026
日期:1993.12
Ion channel mimics were assembled from a modular construction set consisting of core units, derived from polycarboxylate 18-crown-6 ethers, wall units, derived from macrocyclic tetraesters, and polar head groups which provide overall amphiphilic character. The preparation of symmetrical and side-discriminated macrocyclic tetraesters from diols and maleic anhydride gave the required macrocycles in low yields by acid-catalyzed esterification, or by carboxylate alkylation. Addition of 1 equiv of 3-mercaptopropanol to the macrocyclic dienes gave the wall unit precursor. Coupling of the walls to the crown ether via esters was achieved by carboxylate alkylation. The syntheses were completed by Michael addition of head group thiolates. Twenty-one candidate ion channels of molecular weight 1600-4800 g/mol were prepared and characterized.
Continuous Flow Inter- and Intramolecular Macrolactonization under High Dilution Conditions
iodide) has been developed for medium to large sized macrocyclic lactones. In comparison with other methods, the continuous flow process provided good to high yield in a short reaction time. By using this methodology, a wide range of macrocyclic lactones (11 compounds), dilactones (15 compounds), and tetralactone derivatives (2 compounds) with various ring sizes (12–26 atoms in the core) were synthesized