Stereoselective Synthesis of <i>meso</i>- and <i>cis</i>-2,6-Diarylpiperidin-4-ones Catalyzed by <scp>l</scp>-Proline

Abstract

A convenient stereoselective preparation of meso- and cis-2,6-diarylpiperidin-4-ones has been developed by aza-Diels-Alder reaction­ catalyzed by l-proline from simple and commercially available starting materials.