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Cascade Annulation Reactions To Access the Structural Cores of Stereochemically Unusual Strychnos Alkaloids

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Abstract

A new cascade annulation reaction has been developed to access the core structures of a novel family of strychnos alkaloids with a unique stereochemical arrangement. The new annulation cascade is facilitated by the development of a robust reaction sequence to access extremely sensitive N-acyliminium ions. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

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