Isolation of the reactive intermediate in palladium-catalysed coupling of secondary phosphine–boranes with aryl halides

Abstract

Ph₂PH·BH₃ is converted into its K salt with KOSiMe₃ in THF, and the anion reacts with (dppp)Pd(Ph)I to produce the complexed secondary phosphine–borane which decomposes to PPh₃·BH₃ at –10 °C; the C₆F₅ analogue has been crystallographically characterised.