Oxidative Addition of HP(O)Ph₂ to Platinum(0) and Palladium(0) Complexes and Palladium-Catalyzed Regio- and Stereoselective Hydrophosphinylation of Alkynes

Abstract

Oxidative addition of Ph2P(O)H to M(PEt3)3 (M = Pd, Pt) readily took place at room temperature in benzene to afford cis-MH[P(O)Ph2][PPh2(OH)](PEt3) complexes. The structure of the platinum complex was determined by X-ray crystallography. The palladium complex was found to undergo an insertion reaction with oct-1-yne to give 1- and 2-(diphenylphosphinyl)oct-1-enes. Pd(PPh3)4 catalyzed regio- and stereoselective synthesis of alkenyldiphenylphosphine oxides (hydrophosphinylation) from alkynes and Ph2P(O)H.