Carbenes ring true: N‐Heterocycliccarbene (NHC) catalyzed reactions of α‐bromo‐α,β‐unsaturated aldehydes/α,β‐dibromoaldehydes with 1,3‐dinucleophilic reagents, such as 1,3‐dicarbonyl compounds, β‐enamino ketones, and β‐enamino esters through umpolung processes gave functionalized 3,4‐dihydropyranones and 3,4‐dihydropyridinones (see scheme). The availability of the starting materials, lack of external