Abstract Two different organocatalytic approaches for the asymmetricsynthesis of 2,3,4-trisubstituted piperidines were developed. Both approaches were based on an aza-Michael addition followed by cyclization and gave products in high enantiomeric excess. Two different organocatalytic approaches for the asymmetricsynthesis of 2,3,4-trisubstituted piperidines were developed. Both approaches were based