A Polystyrene‐Cross‐Linking Tricyclohexylphosphine: Synthesis, Characterization and Applications to Pd‐Catalyzed Cross‐Coupling Reactions of Aryl Chlorides

A polystyrene-cross-linking tricyclohexylphosphine (PS-TCP) was synthesized through radical emulsion polymerization of 4-tert-butylstyrene as a monomer and tris(trans-4-styrylcyclohexyl)phosphine as a threefold cross-linker. The PS-TCP showed enhanced ligand performance compared to the corresponding polystyrene-triphenylphosphine hybrid PS-TPP and tricyclohexylphosphine in Pd-catalyzed Suzuki-Miyaura and Buchwald-Hartwig reactions of aryl chlorides.