Aryl‐Diadamantyl Phosphine Ligands in Palladium‐Catalyzed Cross‐Coupling Reactions: Synthesis, Structural Analysis, and Application

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Synthesis, temperature‐dependent NMR structure investigation and utilization of a new, stable and easily accessible aryl‐diadamantylphosphine ligand family is reported. The bulky and electron‐rich phosphorus center of the ligand enhances the catalytic activity of palladium in cross‐coupling reactions of sterically demanding ortho ‐substituted aryl halides. In our study, we demonstrated the synthetic applicability of the new phosphine ligands in Buchwald‐Hartwig and tosyl hydrazone coupling reactions.