Bifunctional Ru‐loaded Porous Organic Polymers with Pyridine Functionality: Recyclable Catalysts for N‐Formylation of Amines with CO 2 and H 2

Abstract A series of pyridine functionalized porous organic polymers (POPs‐Py&PPh 3 ) have been synthesized by polymerizing tris(4‐vinylphenyl)phosphane and 4‐vinylpyridine. The pyridine moieties in the copolymer materials contribute to CO 2 adsorption and promote the subsequent conversion of CO 2 . The POP supported Ru catalyst (Ru/POP 3 ‐Py&PPh 3 ) shows a high catalytic activity (TON up to 710) in the N‐formylation of various primary and secondary amines with CO 2 /H 2 , affording the corresponding formamides in good yields (55–95%) under mild reaction conditions. The heterogeneous catalyst can be easily separated from the reaction system and reused for at least eight cycles in the N‐formylation of morpholine. magnified image