A Novel Selective Aza‐Morita–Baylis–Hillman (aza‐MBH) Domino Reaction and Aza‐MBH Reaction of N‐Sulfonated Imines with Acrolein Catalyzed by a Bifunctional Phosphine Organocatalyst

Simple domino reaction: The first aza-MBH/Michael/aldol/dehydrate domino reaction has been described. In the presence of a bifunctional phosphine organocatalyst the N-sulfonated imines and acrolein gave the tetrahydropyridine derivatives and aza-MBH products selectively in good to excellent yields (see scheme; aza-MBH=aza-Morita–Baylis–Hillman).