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Herein, we report the first enantioselective synthesis of dichrocephones A and B, which are cytotoxic triquinane sesquiterpenes with a dense array of stereogenic centers within a strained polycyclic environment. Key features include the application of a catalytic asymmetric Wittig reaction, followed by stereoselective functionalization of the propellane core into a pentacyclic intermediate. Double...
Die Synthese von Strophasterol A, einem Moderator des Stresses des endoplasmatischen Retikulums (ER‐Stress) in der Alzheimer‐Krankheit und erstem Vertreter einer neuartigen Klasse von Secosterolen, gelang unter Anwendung eines Schrittes aus dessen vermuteter Biosynthese sowie zweier C‐H‐Oxidationen. Die Analyse der Intermediate unter Gesichtspunkten ihrer inhärenten Reaktivität ermöglichte es weiterhin,...
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