Metal–Pyrazole Bifunction in Half‐Sandwich CN Chelate Iridium Complexes: Pyrazole–Pyrazolato Interconversion and Application to Catalytic Intramolecular Hydroamination of Aminoalkene

Metal–pyrazole concerto: Protic pyrazole complex 1 underwent reversible dehydrochlorination to give pyrazolato complexes 2 and 3. Hydrido complex 4 was obtained by transfer hydrogenation of 1 and 2. The metal–ligand bifunction evidenced by these transformations was successfully applied to catalytic intramolecular hydroamination of unactivated, ω-alkenic primary and secondary amines.