ChemInform Abstract: Chemoenzymatic Preparation of trans‐2,6‐Dialkylpiperidines and of Other Azacycle Building Blocks. Total Synthesis of (+)‐Desoxoprosopinine.

Abstract The oxazolones (II) are prepared in either antipodal form (> 95% e.e.) by a known simple chemoenzymatic method involving optical resolution of (I) with papain and subsequent aza‐Achmatowicz reaction.