Currently there is some interest in developing methods to efficiently reduce carbon dioxide as the ultimate carbon source. We have recently developed zinc hydrides to promote this reduction by hydrosilylation.1 In the course of this study, triphenylborane has been found to act as a selective Lewis acid catalyst for the hydrosilylation of carbon dixide to give silylformates in high yield (&gt;95%) under mild conditions. Mechanistic studies suggest that relatively weak interaction of BPh3 with both the substrates are crucial for a productive turnover. This simple catalyst system is also active for hydrosilylation of aldehydes and amides, and quite remarkably, for the dehydrogenative coupling of silanes with protic substrates alcohols, amines, and water. 1. Rit, A.; Maron, L.; Spaniol, T. P.; Okuda, J. Angew. Chem. Int. Ed. 2014, 53, 13273–13277.

Hydrosilylation of carbon dioxide catalyzed by triphenylborane

251st National Meeting (2016)

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