Synthesis and Structure of Lower Rim C-Linked <i>N</i>-Tosyl Peptidocalix[4]arenes
作者:Sofiane Ben Sdira、Caroline P. Felix、Marie-Béatrice A. Giudicelli、Pascal F. Seigle-Ferrand、Monique Perrin、Roger J. Lamartine
DOI:10.1021/jo034275j
日期:2003.8.1
Chiral p-tert-butylcalix[4]arenes functionalized at the lower rim with amino acid residues have been prepared. The (1)H and (13)C NMR spectra indicate that the macrocycles preferably adopt a cone conformation. Calix[4]arenes bearing amino acid moieties were prepared as a class of receptors selective for anions that are bound through hydrogenbonding with the NH group. The association constants are
Enzyme Mimics for Michael Additions with Novel Proton Transport Groups
作者:Luis Simón、Francisco M. Muñiz、Silvia Sáez、César Raposo、Joaquín R. Morán
DOI:10.1002/ejoc.200701207
日期:2008.5
Molecular receptors with an enzyme-like behavior in the Michaeladdition of pyrrolidine to an α,β-unsaturated lactam have been designed. Catalytic activities are discussed and related to the substrate association constants. Chiral assistance of enantiomerically pure receptors was also investi