Synthesis and Biological Evaluation of α-Tubulin-Binding Pironetin Analogues with Enhanced Lipophilicity
作者:Miguel Carda、Juan Murga、Santiago Díaz-Oltra、Jorge García-Pla、Julián Paños、Eva Falomir、Chiara Trigili、J. Fernando Díaz、Isabel Barasoain、J. Alberto Marco
DOI:10.1002/ejoc.201201283
日期:2013.2
Four new lipophilicanalogues of the natural pyrone pironetin have been prepared. The C9 side-chain of the latter has been replaced in one analogue by a 4-phenylbutyl chain and in the other three analogues by C13 or C16 aliphatic chains, all of them bearing two stereogenic centres. Their cytotoxic activities and interactions with tubulin have been investigated. It was found that all four are cytotoxic
Enantiodivergent Chemoenzymatic Synthesis of (S)- and (R)-(Z)-9-Dodecyl-4,5,8,9-tetrahydro-3H-oxonin-2-one as Analogues of Topsentolides
作者:Isolde Wetzel、Jurgen Krauss、Franz Bracher
DOI:10.2174/157017812800167466
日期:2012.3.1
(Z)-4,5,8,9-Tetrahydro-3H-oxonin-2-one is the core of naturally occurring topsentolides, cytotoxic oxylipins isolated from a marine sponge of the genus Topsentia. An enantiodivergent approach to topsentolide analogues was worked out with a lipase-catalyzed kinetic resolution of a secondary alcohol and a ring-closing metathesis giving the unsaturated nine-membered lactone as key steps.