1-phenylallyl pivalates was developed through reductive C(sp3)–Obondcleavage. This method represents the first example of the direct application of vastly abundant calcium granules to a reductive coupling reaction. A broad range of propargylsilanes and allylsilanes are simply prepared using easy-to-handle pivalates and chlorotrimethylsilane under mild catalyst-free and additive-free conditions.
作者:Federica Carlet、Greta Bertarini、Gianluigi Broggini、Alexandre Pradal、Giovanni Poli
DOI:10.1002/ejoc.202100026
日期:2021.4.22
An oxoammonium‐mediated α‐C(sp3) allylation of allyl‐ and benzyl ethers using allylsilanes as nucleophilic partners is disclosed. This new C−C bond forming C−H activation process allows to obtain the corresponding coupled products in moderate to good yields.
Palladium-Catalyzed Allylic C−OH Functionalization for Efficient Synthesis of Functionalized Allylsilanes
作者:Nicklas Selander、Jennifer R. Paasch、Kálmán J. Szabó
DOI:10.1021/ja1096732
日期:2011.1.26
A new method is described for palladium-catalyzed allylic silylation using allylic alcohols and disilanes as precursors. The reactions proceed smoothly under mild and neutralconditions, and this method is suitable for synthesis of regio- and stereodefined allylsilanes. The presented silylation reaction can be easily extended to include synthesis of allylboronates by change of the dimetallic reagent
Chemoselective Three‐Component Geminal Cross Couplings of Dihaloalkanes with Cr Catalysis: Rapid Access to Tertiary and Quaternary Alkanes via a Metal–Carbene Intermediate
The three-component geminal couplings have been achieved by design of a chromium catalytic system using dihaloalkanes to selective react with organomagnesium and chlorosilanes/alkyl tosylates. These newly developed reactions are effective for rapidly forming tertiary and quaternary alkanes via a Cr carbene intermediate with a novel inner-sphere radical coupling mechanism, showing great potential in
Asymmetric synthesis catalyzed by chiral ferrocenylphosphine-transition metal complexes. 3. Preparation of optically active allylsilanes by palladium-catalyzed asymmetric Grignard cross-coupling