Synthesis of Dihydro‐2‐oxopyrrole (DPO) Building Blocks Catalyzed by Potassium Carbonate

A dimerization and cyclization cascade reaction of 2‐sulfonaminoacrylates catalyzed by K2CO3 provides dihydro‐2‐oxopyrrole (DPO) derivatives. This straightforward and atom‐economic transformation features a simple experimental operation with easily available starting materials, a broad substrate scope as well as good functional group tolerance. The desired DPO building blocks are obtained in moderate to good yields. We have disclosed a novel and efficient dimerization and cyclization cascade reaction of 2‐sulfonaminoacrylate derivatives catalyzed by K2CO3 to synthesize dihydro‐2‐oxopyrroles (DPO) in moderate to good yields in one step.