Palladium-Catalyzed C−P Coupling Reactions between Vinyl Triflates and Phosphine−Boranes: Efficient Access to Vinylphosphine−Boranes

Vinylphosphine−borane complexes are easily synthesized
by palladium-catalyzed C−P cross-coupling of vinyl triflates
with secondary phosphine−boranes. This method allows the
synthesis of phosphine derivatives not always easily accessible by other approaches. The vinylphosphine derivatives
are purified by chromatography on silica gel. The versatility
of the method is proved by using various triflates and diaryl-,
dialkyl- and alkylarylphosphine−borane precursors. Chiral
enantiopure phosphine−boranes are synthesized from chiral
triflates.