Metal-Free Catalytic Hydrogenolysis of Silyl Triflates and Halides into Hydrosilanes

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 H-2 and generate a boron hydride intermediate capable of reducing (pseudo)halosilanes. This metal-free organocatalytic system is competitive with metal-based catalysts and enables the formation of a variety of hydrosilanes at room temperature in high yields (>85 %) under a low pressure of H-2 (<= 10 bar).

Automated summary

The metal-free catalytic hydrogenolysis of silyl triflates and halides to hydrosilanes is achieved using arylborane Lewis acids as catalysts. The catalyst acts as a Frustrated Lewis Pair and is able to split H-2 and generate a boron hydride intermediate capable of reducing (pseudo)halosilanes. This metal-free organocatalytic system competes with metal-based catalysts and enables the formation of a variety of hydrosilanes at room temperature in high yields under low hydrogen pressure.