Acid Promoted Cinnamyl Ion Mobility within Peptide Derived Macrocycles
We are developing methods that restrict the conformational mobility of peptides and related heteropolymers while simultaneously altering their properties. Our experiments occur as processes wherein a conserved, lipophilic reagent is activated in stages to form composite products with unprotected pol...
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Published in | Journal of the American Chemical Society Vol. 130; no. 42; pp. 13864 - 13866 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
WASHINGTON
American Chemical Society
22.10.2008
Amer Chemical Soc |
Subjects | |
Online Access | Get full text |
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Summary: | We are developing methods that restrict the conformational mobility of peptides and related heteropolymers while simultaneously altering their properties. Our experiments occur as processes wherein a conserved, lipophilic reagent is activated in stages to form composite products with unprotected polyamides in parallel. For each starting oligomer, the goal is to create not one, but rather a collection of products. The intent is for those materials to retain molecular recognition elements of the biopolymer, yet display that functionality as part of stable, cyclic structures having defined shapes and enhanced membrane solubility/permeability. Here we describe reagent 2 and its two-step integration into peptides to afford macrocyclic ethers (e.g., 4 when starting with W-W-Y). When those materials are treated with protic acid in anhydrous solvent, the cinnamyl unit migrates from the oxygen of tyrosine to distribute throughout the structure, forming new products via carbon/carbon bonding. These changes occur concomitantly with acid-promoted rearrangements/cyclizations of the dienyne appendage to generate mixtures containing unique macrocycles such as 15. Similar amalgamations of 2 with more diverse peptides is a means to begin accessing complex peptidomimetics systematically. From a library of screening fractions generated in this way, we have identified a small molecule that selectively promotes hippocampal neurogenesis in the adult mouse brain. |
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Bibliography: | Experimental procedures and characterization data for new compounds. This material is available free of charge via the Internet at http://pubs.acs.org. ark:/67375/TPS-NZS15R3M-F istex:ED4AC6C29085B9E078C50F6F461B0A0AA65363DE ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0002-7863 1520-5126 |
DOI: | 10.1021/ja803299h |