Novel and Stereocontrolled Synthesis of Enantiopure and Polyalkyl Substituted Piperidines

Abstract
A flexible and stereodivergent synthesis of enantiopure piperidines with up to four alkyl-substituted chiral centers is reported which proceeds by way of a double nucleophilic addition of primary amines to the 7-oxo-2-enimides 1. These in turn are accessible via the silyloxy-Cope rearrangement of chiral syn-aldol products.

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