Title

Synthesis of the natural product descurainolide and cyclic peptides from lignin-derived aromatics

Publication Date

2018

Journal Title

Org Biomol Chem

Abstract

© 2017 The Royal Society of Chemistry. Alternative sources of potential feedstock chemicals are of increasing importance as the availability of oil decreases. The biopolymer lignin is viewed as a source of useful mono-aromatic compounds as exemplified by the industrial scale production of vanillin from this biomass. Alternative lignin-derived aromatics are available in pure form but to date examples of the use of these types of compounds are rare. Here we address this issue by reporting the conversion of an aromatic keto-alcohol to the anti- and syn-isomers of Descurainolide A. The key step involves a rhodium-catalyzed allylic substitution reaction. Enantio-enriched allylic alcohols were generated via an isothiourea-catalyzed kinetic resolution enabling access to both the (2R,3R) and (2S,3S) enantiomers of anti-Descurainolide A. In addition we show that the lignin-derived keto-alcohols can be converted into unnatural amino acid derivatives of tyrosine. Finally, these amino acids were incorporated into cyclic peptide scaffolds through the use of both chemical and an enzyme-mediated macrocylisation.

Volume Number

16

Issue Number

2

Pages

266 - 273

Document Type

Article

Status

Faculty

Facility

School of Medicine

Primary Department

Urology

PMID

29242868

DOI

10.1039/c7ob02697h

Comments

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