Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 7, Pages 2098-2101Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b12301
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Funding
- National Institutes of Health [GM102735]
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As a rich source of therapeutic agents, peptide natural products usually adopt a cyclic or multicyclic scaffold that minimizes structural flexibility to favor target binding. Inspired by nature, chemists have been interested in developing synthetic cyclic and multicyclic peptides that serve as biological probes and potential therapeutics. Herein we describe a novel strategy for peptide cyclization in which intramolecular iminoboronate formation allows spontaneous cyclization under physiologic conditions to yield monocyclic and bicyclic peptides. Importantly the iminoboronate-based cyclization can be rapidly reversed in response to multiple stimuli, including pH, oxidation, and small molecules. This highly versatile strategy for peptide cyclization should find applications in many areas of chemical biology.
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