Hydrosilylation of alkynes catalysed by platinum on titania

The heterogeneous hydrosilylation of alkynes catalysed by platinum on titania is reported. A variety of hydrosilanes react with both terminal and internal alkynes to furnish the corresponding vinyl silanes in high yields and short reaction times as well as in a regio- and stereoselective manner. The catalyst can be easily recovered and reused in several consecutive cycles.

Platinum on titania catalyses the hydrosilylation of both terminal and internal alkynes in high yields and short reaction times as well as in a regio- and stereo-selective manner. The catalyst can be reused in several consecutive cyclesFigure optionsDownload as PowerPoint slideResearch highlights
► The heterogeneous platinum-catalysed hydrosilylation of alkynes has been scarcely studied. Platinum on titania is a new catalytic system for the heterogeneous hydrosilylation of alkynes.
► Reactions proceed under mild conditions (70 °C or room temperature), in air and in short reaction times (≤1 h).
► Both, terminal and internal alkynes have been hydrosilylated in high yields and regioselectivities of up to 94:6. The β-substituted vinyl silanes were obtained with exclusive trans stereochemistry.
► The catalyst can be reused in four consecutive cycles with a high performance. To the best of our knowledge, this is the first heterogeneous platinum-catalysed hydrosilylation of alkynes in which the catalyst is reused without any pre-treatment.