Phosphine-borane complexes are very stable reagents. When borane is added to the phosphine, these complexes have a reactivity similar to phosphine-oxide. Alkylation reactions and olefination reactions (Horner type1) with these complexes are easily obtained
Synthesis and reactions of phosphine-boranes. Synthesis of new bidentate ligands with homochiral phosphine centers via optically pure phosphine-boranes