Direct Organocatalytic Asymmetric Approach to Baylis–Hillman‐Type Products Through a Push–Pull Dienamine Platform

A general process for the asymmetric synthesis of highly substituted 3‐alkyl‐Hagemann's esters was achieved for the first time through organocatalytic Michael or Baylis–Hillman‐type (BH‐type) reaction of Hagemann's esters with β‐nitrostyrenes in the presence of a catalytic amount of L ‐(3,5‐Me 2 ) 2 DPP/thiourea. We have discovered, for the first time, the chiral BH‐type products from Hagemann's esters with β‐nitrostyrenes by utilizing the push–pull dienamine platform.