2007 Feb 1 .
Synthesis of IB-01211, a Cyclic Peptide Containing 2,4-Concatenated Thia- and Oxazoles, via Hantzsch Macrocyclization.
Hernandez D, Vilar G, Riego E, Canedo LM, Cuevas C, Albericio F, Alvarez M.
Barcelona Science Park Josep Samitier 1-5, E-08028 Barcelona, Spain.
An efficient and versatile convergent synthesis of IB-01211 based on a combination of peptide and heterocyclic chemistry is described. The key step in the synthesis is macrocyclization through intramolecular Hantzsch formation of the thiazole ring. Dehydration of a free primary alcohol to furnish the exocyclic methylidene present in the natural product was applied during the macrocyclization.