Organocatalytic Regio‐ and Stereoselective Inverse‐Electron‐Demand Aza‐Diels–Alder Reaction of α,β‐Unsaturated Aldehydes and <i>N</i>‐Tosyl‐1‐aza‐1,3‐butadienesBo Han, Ying‐Chun Chen, Kun Jiang et al.|Angewandte Chemie International Edition|2009Cited by 222