Synthesis of a novel category of pseudo-peptides using an Ugi three-component reaction of levulinic acid as bifunctional substrate, amines, and amino acid-based isocyanides
The synthesis of a novel category of pseudo-peptides via intramolecular Ugi reaction of levulinic acid (4-oxopentanoic acid), aromatic and aliphatic amines, and aminoacid-based isocyanides is reported. Levulinic acid was applied as a bifunctional substrate containingboth carbonyl and acid moieties suitable for the Ugi reaction. This article provides a facile and convenient one-pot procedure for the