The Lewis base-promoted hydrosilylation of cyclic malonates provides a convenient synthesis of β-substituted aldehydes. No over-reduction to the primary alcohol is observed as the aldehyde functionality is protected until a subsequent hydrolysis step. The utility of the method is demonstrated in a number of examples and further in the synthesis of γ-substituted propylamines in a one-pot hydrosilylation/reductive amination process.
Frost, C. G., & Hartley, B. C. (2009). Lewis Base-Promoted Hydrosilylation of Cyclic Malonates: Synthesis of β-Substituted Aldehydes and γ-Substituted Amines. The Journal of Organic Chemistry, 74(9), 3599-3602. https://doi.org/10.1021/jo900390d