Cascade Metathesis Reactions for the Synthesis of Taxane and Isotaxane Derivatives

Abstract : Tricyclic isotaxane and taxane derivatives have been synthesized by a very efficient cascade ring-closing dienyne metathesis (RCDEYM) reaction, which formed the A and B rings in one operation. When the alkyne is present at C13 (with no neighboring gem-dimethyl group), the RCEDYM reaction leads to 14,15-isotaxanes 16a,b and 18b with the gem-dimethyl group on the A ring. If the alkyne is at the C11 position (and thus flanked by a gem-dimethyl group), RCEDYM reaction only proceeds in the presence of a trisubstituted olefin at C13, which disfavors the competing diene ring-closing metathesis reaction, to give the tricyclic core of Taxol 44.
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Chemistry - A European Journal, Wiley-VCH Verlag, 2016, 22 (20), pp.6891-6898. 〈10.1002/chem.201600592〉
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Soumis le : mercredi 24 août 2016 - 15:04:16
Dernière modification le : jeudi 10 mai 2018 - 02:07:44

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Cong Ma, Aurélien Letort, Rémi Aouzal, Antonia Wilkes, Gourhari Maiti, et al.. Cascade Metathesis Reactions for the Synthesis of Taxane and Isotaxane Derivatives. Chemistry - A European Journal, Wiley-VCH Verlag, 2016, 22 (20), pp.6891-6898. 〈10.1002/chem.201600592〉. 〈hal-01355946〉

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