Hydrogenation, hydrogen transfer and hydrosilylation reactions assisted by boranes

2 Hydrogenation, hydrogen transfer and hydrosilylation reactions assisted by boranes 

1 Boranes as hydride shuttles hydride shift from boron to transition metals 

Further progress in the Lewis acid assisted activation of was achieved by Harman and Peters with bisphosphine-borane Ni complexes. An ideal balance between accessibility, stability and reactivity was met in the diamagnetic Ni(0) complex 47a. Obtained by 

23 Lewis acid enhancement upon n-coordination of arylboranes, application to the catalytic hydrogenation of imines 

Besides cooperative activation of across M B, bisphosphine-borane complexes have been used to mediate activation and transfer in a FLP-type marmer. Starting from [RuCl2(PPh3)3], the cationic mthenium complex 55 was readily prepared by phosphine displacement and chloride abstraction. The phenyl group at boron is Ti -coordinated to Ru 

---