Employing the Structural Diversity of Nature: Development of Modular Dipeptide-Analogue Ligands for Ruthenium-Catalyzed Enantioselective Transfer Hydrogenation of Ketones
作者:Isidro M. Pastor、Patrik Västilä、Hans Adolfsson
DOI:10.1002/chem.200304900
日期:2003.9.5
stereocenters, it was demonstrated that the absolute configuration of the product alcohol was determined by the configuration of the amino acidpart of the ligand. Employing ligands based on L-amino acids generated S-configured products, and catalysts based on D-amino acids favored the formation of the R-configured alcohol. The combination N-Boc-L-alanine and (R)-phenylglycinol (Boc-L-Ab) or its enantiomer
A Prototype Calix[4]arene-Based Receptor for Carbohydrate Recognition Containing Peptide and Phosphate Binding Groups
作者:Margarita Segura、Barbara Bricoli、Alessandro Casnati、Eva Maria Muñoz、Francesco Sansone、Rocco Ungaro、Cristina Vicent
DOI:10.1021/jo034471q
日期:2003.8.1
A novel class of macrobicyclic receptors for carbohydrate recognition based on upper rim, peptide-bridged calix[4]arenes has been designed and synthesized. Receptor 12, in which a charged phosphate group cooperates with peptide hydrogen-bonding donor and acceptor groups in the binding process, is the most efficient and selective in the complexation of simple carbohydrate derivatives. The selectivity