Synthesis and Evaluation of Radamide Analogues, A Chimera of Radicicol and Geldanamycin
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Issue Date
2009-07-03Author
Hadden, M. Kyle
Blagg, Brian S. J.
Publisher
American Chemical Society
Type
Article
Article Version
Scholarly/refereed, author accepted manuscript
Rights
This document is the Accepted Manuscript version of a Published Work that appeared in final form in the Journal of Organic Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jo900278g.
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Previously, we reported the Hsp90 inhibitory activity of radamide, an open chain amide chimera of geldanamycin and radicicol. Attempts to further expand upon structure–activity relationships for this class of Hsp90 inhibitors led to the preparation of a series of radamide analogues focused on differing tether lengths and quinone mimics. In addition, the cup-shaped conformation adopted by the two natural products when bound to the Hsp90 N-terminal ATP binding pocket suggests that conformationally biased compounds may demonstrate improved binding and inhibition. The preparation and evaluation of radamide analogues with cis/trans α,β-unsaturated amides yielded compounds that exhibit improved antiproliferative activity. In addition, several analogues demonstrated the ability to induce degradation of Hsp90-dependent oncogenic signaling proteins in vitro, a hallmark of Hsp90 N-terminal inhibition.
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Citation
Hadden, M. K., & Blagg, B. S. J. (2009). Synthesis and Evaluation of Radamide Analogues, A Chimera of Radicicol and Geldanamycin. The Journal of Organic Chemistry, 74(13), 4697–4704. http://doi.org/10.1021/jo900278g
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