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Conjugate Addition of 2-Acetylindole Enolates to UnsaturatedOxazolopiperidone Lactams: Enantioselective Access to the Tetracyclic RingSystem of Ervitsine

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The stereochemical outcome of the conjugate addition reactions of 2-acetylindole enolates to unsaturated phenylglycinol-derived oxazolopiperidone lactams 1a-f is studied. After reduction of the 2-acylindole carbonyl group, the Michael adduct cis-6 underwent a Lewis acid-promoted intramolecular α-amidoalkylation, enantioselectively leading to the tetracyclic ring system of the indole alkaloid ervitsine Keywords: Lactams / Asymmetric synthesis / Cyclization / Michael addition / Heterocycles

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Versió postprint del document publicat a:

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European Journal of Organic Chemistry, 2011, p. 898-907

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Articles publicats en revistes (Farmacologia, Toxicologia i Química Terapèutica)

# metadata.dc.title[].value
Conjugate Addition of 2-Acetylindole Enolates to UnsaturatedOxazolopiperidone Lactams: Enantioselective Access to the Tetracyclic RingSystem of Ervitsine