5,5′-Diamino-BIPHEP ligands bearing small selector units for non-covalent binding of chiral analytes in solution
作者:G. Storch、M. Siebert、F. Rominger、O. Trapp
DOI:10.1039/c5cc06306j
日期:——
A dynamic axially chiral BIPHEP-ligand with 3,5-dichlorobenzoyl amide selector units for non-covalent binding of phenylalanine derivatives has been developed.
As a continuation of our previous work, a series of new phenyl acrylamide derivatives (4Aa-g, 4Ba-t, 5 and 6a-c) were designed and synthesized as non-nucleoside anti-HBV agents. Among them, compound 4Bs could potently inhibit HBV DNA replication in wild-type and lamivudine (3TC)/entecavir resistant HBV mutant strains with IC50 values of 0.19 and 0.18 μM, respectively. Notably, the selective index value
Analyte Templating: Enhancing the Enantioselectivity of Chiral Selectors upon Incorporation into Organic Polymer Environments
作者:Elena Gavioli、Norbert M. Maier、Karsten Haupt、Klaus Mosbach、Wolfgang Lindner
DOI:10.1021/ac050407s
日期:2005.8.1
A simple strategy for preserving and enhancing the chiral recognition capacity of polymer-embedded chiral selectors is proposed, capitalizing on a temporary blockage of the receptor binding site with tightly binding analytes during the polymerization process. We demonstrate that the copolymerization of a quinine tert-butylcarbamate selector monomer with chiral (and achiral) 3,5-dichlorobenzoyl amino acids allows one to control to a certain extent the binding characteristics of the resultant polymeric chiral stationary phases. The structural and stereochemical requirements of the templating analytes for maximizing the chiral recognition capacity of the polymer-embedded selectors are probed. The chromatographic chiral recognition characteristics of the analyte-templated polymeric chiral stationary phases are analyzed with respect to binding capacities and affinities and compared to those obtained with a conventional silica-based surface-grafted reference material. Changes in substrate-specific enantioselectivity originating from analyte templating are also addressed.