An efficient new synthesis has been elaborated for non-natural (−)-dactylolide ((−)-2) and its 13-desmethylene analogue 4, employing a HWE-based macrocyclization approach with β-keto-phosphonate/aldehyde 19 and the respective 13-desmethylene derivative as the key intermediates. Both (−)-2 and 4 as well as the corresponding C20 alcohols inhibit human cancer cell proliferation with IC50 values in the
Synthesis and Structure‐Activity Relationship Studies of C(13)‐Desmethylene‐(−)‐Zampanolide Analogs
作者:Tobias M. Brütsch、Etienne Cotter、Daniel Lucena‐Agell、Mariano Redondo‐Horcajo、Carolina Davies、Bernhard Pfeiffer、Sandro Pagani、Simone Berardozzi、J. Fernando Díaz、John H. Miller、Karl‐Heinz Altmann
DOI:10.1002/chem.202300703
日期:2023.6.27
Reduced or demethylated variants of a C(13)-desmethylene congener of the marine microtubule stabilizer (−)-zampanolide have been prepared by HWE-based macrocyclization and stereoselective construction of the hemiaminal center in the side chain. While all modifications led to reduced growth inhibitory activity, the 2,3-dihydro and the C(17)-desmethyl variants retained potent antiproliferative activity