Regioselective Rh(I)-Catalyzed Sequential Hydrosilylation toward the Assembly of Silicon-Based Peptidomimetic Analogues
摘要:
A highly regioselective Rh(I)-catalyzed hydrosilylation of enamides is presented. This mild protocol allows access to a wide variety of different arylsilanes with substitution at the beta-position of the enamide and functionalization on the alkyl chain tethered to the silane. This protocol is extended to include a sequential one-pot hydrosilylation. Using diphenylsilane as the appendage point, hydrosilylation of a protected allyl alcohol followed by hydrosilylation of an enamide generates a complex organosilane in one step. This highly convergent strategy to synthesize these functionalized systems now provides a way for the rapid assembly of a diverse collection of silane-based peptidomimetic analogues.
Triorganosilanes, which possess two aryl groups on the silicon atom, undergo palladium-catalyzedsilylation of aryliodides. Aryl(2-furyl)silanes thus obtained are potentially useful starting materials for carbon-carbon bond-forming reactions in the presence of transition-metal catalysts and tetrabutylammonium fluoride.
Novel 3-[(methyl)bis(5-trialkylsilylfuran-2-yl)silyl]propylamines have been synthesized by a hydrosilylation reaction of aliphatic and heterocyclic N-allylamines in the presence of the Speier's catalyst. The effects of the structure of the amine and the alkyl substituent at the silicon atom on the cytotoxicity of the compounds have been studied.
Si–B Functional Group Exchange Reaction Enabled by a Catalytic Amount of BH<sub>3</sub>: Scope, Mechanism, and Application
作者:Jiong Zhang、Rui Wei、Chunping Ren、Liu Leo Liu、Lipeng Wu
DOI:10.1021/jacs.3c05625
日期:2023.7.19
Functional groupexchanges based on single-bond transformation are rare and challenging. In this regard, functional groupexchangereactions of hydrosilanes proved to be more problematic. This is because this exchange requires the cleavage of the C–Si bond, while the Si–H bond is relatively easily activated for hydrosilanes. Herein, we report the first Si–B functional groupexchangereactions of hydrosilanes