Access to 2,6-Disubstituted Piperidines: Control of the Diastereoselectivity, Scope, and Limitations. Applications to the Stereoselective Synthesis of (−)-Solenopsine A and Alkaloid (+)-241D

Abstract

Scope and limitations in the diastereoselective preparation of 2,6-<i>cis</i> or 2,6-<i>trans</i> disubstituted piperidines are described, through intramolecular reaction of chiral β′-carbamate-α,β-unsaturated ketone. This methodology has been applied to the total synthesis of a few well chosen examples, such as (−)-solenopsine A and alkaloid (+)-241D