Synthesis and Enantiomeric Recognition Studies of Novel C2-Symmetrical Chiral Tetra-Amide Compounds

Abstract

Two novel C2-symmetrical chiral tetraamide compounds derived from (S)-isoleucine were synthesised and their enantiomeric recognition abilities towards enantiomers of some amino acid esters and 1-arylethylamins were examined by UV-titration method. These receptor compounds exhibited strong complexation (with Ka up to 5787.23 M-1) and very good enantioselectivity (up to KaS/KaR= 13.98).