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■ Synthesis and Reactivity of a 3-Vinylidenepiperidine as a Model Study of α-Allenic Amines

Daniel Solé, Silvina Garcia-Rubio, Joan Bosch, and Josep Bonjoch

*Laboratory of Organic Chemistry, Faculty of Pharmacy, University of Barcelona, Av. de Joan XXIII, s/n, 08028 Barcelona, Spain

Abstract

4-Acetonyl-1-benzyl-3-vinylidenepiperidine (8), prepared by cyclization of Propargylic Silane (7), was used as a model to study the usefulness of the allene moiety as a precursor of the two-carbon chain present in the piperidine ring of Strychnos alkaloids.