Borane Catalyst Hydrosilylation of Furan Derivatives

The patent introduces borane compounds as intermediary catalysts to mediate the hydrosilylation reaction between furan derivatives and silane compounds. The borane catalyst acts as a mediator that enables the reaction to proceed with high yield and stereoselectivity under mild and eco-friendly conditions, replacing the traditional metallic catalysts that caused environmental harm and poor reaction outcomes.

The patent changes the catalytic parameter from metallic catalysts to borane compounds, which fundamentally alters the reaction parameters. This parameter change enables the reaction to proceed with high stereoselectivity under mild temperature conditions (room temperature or slightly elevated), avoiding the harsh conditions required by traditional metallic catalysts.

The patent employs borane compounds as disposable catalysts that can be used in small amounts (0.01-5 mol%) to achieve high yields. The borane catalyst, while potentially single-use or limited in stability, is employed in such small quantities that it becomes economically viable for mass production, contrasting with metallic catalysts that require higher amounts and achieve lower yields.

The patent creates a composite catalytic system by combining borane compounds with specific additives or using modified borane structures (such as borane-thf complexes or borane-hydrocarbon adducts). This composite approach enhances both the conversion yield and stereoselectivity simultaneously, achieving what neither component could accomplish alone.