Catalytic hydrogenation using complexes of base metals with tridentate ligands

摘要

Complexes of cobalt and nickel with tridentate ligand PNHPR are effective for hydrogenation of unsaturated compounds. Cobalt complex [(PNHPCy)Co(CH2SiMe3)]BArF4 (PNHPCy=bis[2-(dicyclohexylphosphino)ethyl]amine, BArF4=B(3,5-(CF3)2C6H3)4)) was prepared and used with hydrogen for hydrogenation of alkenes, aldehydes, ketones, and imines under mild conditions (25-60° C., 1-4 atm H2). Nickel complex [(PNHPCy)Ni(H)]BPh4 was used for hydrogenation of styrene and 1-octene under mild conditions. (PNPCy)Ni(H) was used for hydrogenating alkenes.

主权项

1. A composition of the formulawherein each R1 is independently selected from cycloalkyl, alkyl, substituted alkyl, phenyl, or substituted phenyl;
wherein R2 is —CH2Si(CH3)3, H, alkyl, substituted alkyl, phenyl, substituted phenyl, alkoxide, or amido; wherein M is cobalt or nickel; and wherein X is a counterion.