Synlett 2017; 28(15): 1971-1974
DOI: 10.1055/s-0036-1588433
letter
© Georg Thieme Verlag Stuttgart · New York

Total Synthesis of Cordyheptapeptide A

Alfredo R. Puentes
a   Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany   Email: wessjohann@ipb-halle.de
b   Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba   Email: dgr@fq.uh.cu
,
Ricardo A. W. Neves Filho
a   Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany   Email: wessjohann@ipb-halle.de
,
Daniel G. Rivera*
b   Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba   Email: dgr@fq.uh.cu
,
Ludger A. Wessjohann*
a   Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany   Email: wessjohann@ipb-halle.de
› Author Affiliations
Further Information

Publication History

Received: 24 March 2017

Accepted: 01 May 2017

Publication Date:
31 May 2017 (online)


Abstract

The first total synthesis of cordyheptapeptide A is described. The synthesis is accomplished by a convergent approach featuring a combination of peptide coupling and the Ugi reaction for the preparation of the main building blocks and the acyclic precursor. The assembly of an N-methylated fragment by the Ugi reaction comprised the utilization of a convertible isonitrile followed by activation of the C-terminal amide. Two different macrocyclization sites were evaluated, proving greater efficacy the macrolactamization at the site Ile-Tyr, likely due of a more suitable conformational bias of the acyclic precursor having an internal β-turn centered at the N-Me-d-Phe-Pro moiety.

Supporting Information