Metal-free catalytic hydrogenolysis of silyl triflates and halides into hydrosilanes

Gabriel Durin (1) , Albane Fontaine (1) , Jean-Claude Berthet (1) , Emmanuel Nicolas (1) , Pierre Thuéry (1) , Thibault Cantat (1)

1 LCMCE - Laboratoire de Chimie Moléculaire et de Catalyse pour l'Energie (ex LCCEF)

The metal-free catalytic hydrogenolysis of silyl triflates and halides (I, Br) to hydrosilanes is unlocked by using arylborane Lewis acids as catalysts. In the presence of a nitrogen base, the catalyst acts as a Frustrated Lewis Pair (FLP) able to split H2 and generate a boron hydride intermediate prone to reduce (pseudo)halosilanes. This metal-free organocatalytic system is competitive with metal-based catalysts and enables the formation of a variety of hydrosilanes at r.t. in high yields (>85 %) under a low pressure of H$_2$ (≤ 10 bar).

Mots clés: Iridium; Pincer Complexes; Catalysis; Hydrogenolysis; Reduction; Silyl Triflates; Hydrosilanes

Domaines: Catalyse

Gabriel Durin, Albane Fontaine, Jean-Claude Berthet, Emmanuel Nicolas, Pierre Thuéry, et al.. Metal-free catalytic hydrogenolysis of silyl triflates and halides into hydrosilanes. 2022. ⟨cea-03540549⟩