Lewis Base-Promoted Hydrosilylation of Cyclic Malonates: Synthesis of β-Substituted Aldehydes and γ-Substituted Amines
摘要:
The Lewis base-promoted hydrosilylation of cyclic malonates provides a convenient synthesis of beta-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 gamma-substituted propylamines in a one-pot hydrosilylation/reductive amination process.
Lewis Base-Promoted Hydrosilylation of Cyclic Malonates: Synthesis of β-Substituted Aldehydes and γ-Substituted Amines
作者:Christopher G. Frost、Benjamin C. Hartley
DOI:10.1021/jo900390d
日期:2009.5.1
The Lewis base-promoted hydrosilylation of cyclic malonates provides a convenient synthesis of beta-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 gamma-substituted propylamines in a one-pot hydrosilylation/reductive amination process.
Amide-Directed, Rhodium-Catalyzed Regio- and Enantioselective Hydroacylation of Internal Alkenes with Unfunctionalized Aldehydes
作者:Xin Sun、Peng-Chao Gao、Yu-Wen Sun、Bi-Jie Li
DOI:10.1021/jacs.3c10609
日期:2024.1.10
hydroacylations, highly enantioselective catalytic addition of unfunctionalized aldehydes to internal alkenes remains an unsolved challenge. Here, using a coordination-assisted strategy, we developed a rhodium-catalyzed regio- and enantioselectiveaddition of unfunctionalized aldehydes to internal alkenes such as enamides and β,γ-unsaturated amides. Valuable α-amino ketones and 1,4-dicarbonyl compounds were