Versatile Solid-Phase Synthesis of Peptide-Derived 2-Oxazolines. Application in the Synthesis of Ligands for Asymmetric Catalysis
作者:Juan M. Benito、Christian A. Christensen、Morten Meldal
DOI:10.1021/ol047675h
日期:2005.2.1
A mild and high-yielding procedure for the solid-phasesynthesis of 2-oxazolines from amino acids is described. The two-step protocol is based on the iodination of serine containing peptides, followed by in situ nucleophilic attack of the carbonyl oxygen from the next amino acid. Phosphinylation of the terminal amino group cleanly furnishes a resin-bound phosphine-oxazoline ligand, which upon palladium