Catalytic and Stoichiometric Reactivity of β-Silylamido Agostic Complex of Mo: Intermediacy of a Silanimine Complex and Applications to Multicomponent Coupling
作者:Andrey Y. Khalimon、Razvan Simionescu、Georgii I. Nikonov
DOI:10.1021/ja111005r
日期:2011.5.11
reaction of complex (ArN═)(2)Mo(PMe(3))(3) (Ar = 2,6-diisopropylphenyl) with PhSiH(3) gives the β-agostic NSi-H···M silyamido complex (ArN═)Mo(SiH(2)Ph)(PMe(3))(η(3)-ArN-SiHPh-H) (3) as the first product. 3 decomposes in the mother liquor to a mixture of hydride compounds, including complex η(3)-SiH(Ph)-N(Ar)-SiHPh-H···}MoH(3)(PMe(3))(3) characterized by NMR. Compound 3 was obtained on preparative scale
Catalytic Hydrosilylation of Alkenes by a Ruthenium Silylene Complex. Evidence for a New Hydrosilylation Mechanism
作者:Paul B. Glaser、T. Don Tilley
DOI:10.1021/ja037620v
日期:2003.11.1
osmium silylene species containing Si-H bonds have been synthesized and characterized by NMR spectroscopy. The ruthenium complex [Cp*(iPr3P)(H)2Ru=Si(H)Ph.Et2O][B(C6F5)4] catalyzes the hydrosilyation of alkenes with excellent substrate selectivity for primary silanes and exclusive anti-Markovnikov regiochemistry. Evidence for a novel mechanism involving direct addition of an alkene to the silylene Si-H
Yttrium-Benzyl Complexes Bearing Chiral Iminophosphonamide Ligands: Synthesis and Application in Catalytic Asymmetric Amine-Silane Dehydrocoupling Reactions
作者:Nan Li、Bing-Tao Guan
DOI:10.1002/adsc.201700327
日期:2017.10.25
A series of novel iminophosphonamide ligands with chiral diamine moieties were designed and synthesized. Yttrium–benzyl compounds bearing these chiral iminophosphonamide ligands showed high reactivity and selectivity on the first catalytic asymmetric cross‐dehydrogenative coupling of amines with prochiral silanes under mild conditions. A stable silylamine–boron derivative was synthesized in up to 23%
Geometrically Constrained Cationic Low‐Coordinate Tetrylenes: Highly Lewis Acidic σ‐Donor Ligands in Catalytic Systems
作者:Philip M. Keil、Terrance J. Hadlington
DOI:10.1002/anie.202114143
日期:2022.2.14
In stark contrast to poorly electrophilic classical σ-donating spectator ligands, we show that geometricallyconstrained low-coordinate, cationic GeII and SnII ligands remain highly electrophilic in the coordination sphere of Ni0, despite being σ-donors; binding of nucleophiles and fluoride abstraction at the donor atom is demonstrated, alongside the capacity to catalyse the hydrosilylation of alkenes