Implication of a Silyl Cobalt Dihydride Complex as a Useful Catalyst for the Hydrosilylation of Imines
Résumé
Herein we describe the formation and use of silyl cobalt(III) dihydride complexes as powerful catalysts for the hydrosilylation of a variety of imines starting from a low-valent welldefined cobalt(I) complex. The reaction is efficient at low catalyst loadings with a diverse range of imines bearing various protecting groups, as well as aliphatic ketimines and quinoline. Kinetics, DFT calculations, NMR spectroscopic studies, deuteration experiments and X-ray diffraction analysis allowed us to propose a catalytic cycle based on silyl dihydrocobalt(III) complexes performing a hydrocobaltation.
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