Synthesis of Amides‐Functionalized POPs‐Supported Nano‐Pd Catalysts for Phosphine Ligand‐Free Heterogeneous Hydroaminocarbonylation of Alkynes

Development of an approach for synthesis of efficient heterogeneous catalyst toward carbonylation reaction remains a challenge. Herein, we report our results of design and precise synthesis of amide‐functionalized porous organic polymers (POPs) supported nano‐Pd, and its applying in the first example of heterogeneous palladium‐catalyzed hydroaminocarbonylation of alkynes under phosphine ligand‐free conditions. A wide range of terminal alkynes and amines with various functional groups are smoothly converted into the corresponding branched α, β‐unsaturated amides in moderate to good yields with high regioselectivity. The good catalytic performance of amides‐functionalized POPs supported nano‐Pd catalyst should be attributed to fine regulation of the catalytically active sites of the heterogeneous catalyst at the molecular level. The present study provided meaningful insights to design heterogeneous catalysts for phosphine ligand‐free carbonylation reaction.