“…Rather than depending upon the reduction of Sn−N to Sn−H for our turnover step (Figure ), we chose to pursue an alternate strategy that relies upon the reduction of Sn−O to Sn−H (Figure ). Thus, we anticipated that if we added an alcohol to the reaction, transfer of the SnBu 3 group from the nitrogen of the initially formed RNHSnBu 3 to the oxygen of the alcohol would occur (Figure , Sn exchange) . The resulting tin alkoxide could then be reduced by the silicon hydride to regenerate the catalyst, Bu 3 SnH.…”