Nickel‐catalyzed cross‐coupling reactions of chlorosilanes with organoaluminum reagents were developed. An electron‐rich Ni(0)/PCy3 complex was found to be an effective catalyst for the desired transformation. The reaction of dichlorosilanes 1 proceeded to give the corresponding monosubstituted products 2. Trichlorosilanes 4 underwent selective double substitution to furnish the corresponding monochlorosilanes
Quantitative substituent effects in the Grignard reaction with silanes
作者:Oleg Golubev、Dmitri Panov、Anu Ploom、Ants Tuulmets、Binh T. Nguyen
DOI:10.1016/j.jorganchem.2007.05.009
日期:2007.8
the resonance effect of substituents at least in nucleophilic displacement reactions at the silicon center. An attempt to calculate the steric constants for polarsubstituents was made. It appeared that the inductive constants σ∗ derived from the carbon chemistry are not applicable to the silicon chemistry. New scales of parameters for description of polar and steric effects in the organosilicon chemistry
The kinetics of hydrolysis reactions of some chlorodisiloxanes and of the chloropentasiloxanes (Me3) SiO)2Si(Me)OSiAr(Cl)OSiMeAr′ (with Ar = Ph and Ar′ = p-ClC6H4, C6H5 or p-MeC6H4; or Ar′ = Ph and Ar = p-ClC6H4, C6H5 or p-MeC6H4 in dioxane were studied by 1H NMR spectroscopy.
某些氯二硅氧烷和氯五硅氧烷(Me 3)SiO)2 Si(Me)OSiAr(Cl)OSiMeAr'(其中Ar = Ph和Ar'= p -ClC 6 H 4,C 6 H 5或通过1 H NMR光谱研究了在二恶烷中的p -MeC 6 H 4;或Ar'= Ph且Ar = p -ClC 6 H 4,C 6 H 5或p -MeC 6 H 4。
Organocatalytic Asymmetric Synthesis of Si-Stereogenic Silyl Ethers
作者:Hui Zhou、Jung Tae Han、Nils Nöthling、Monika M. Lindner、Judith Jenniches、Clemens Kühn、Nobuya Tsuji、Li Zhang、Benjamin List
DOI:10.1021/jacs.2c04261
日期:2022.6.15
Functionalized enantiopure organosilanes are important building blocks with applications in various fields of chemistry; nevertheless, asymmetric synthetic methods for their preparation are rare. Here we report the first organocatalytic enantioselective synthesis of tertiary silyl ethers possessing “central chirality” on silicon. The reaction proceeds via a desymmetrizing carbon–carbon bond forming
The enantioselective construction of silicon-stereocenter by asymmetric enamine catalysis is reported. The reaction proceeds via an unprecedented desymmetric intramolecular aldolization of prochiral siladials for the diverse synthesis of multifunctional silicon-stereogenic silacycles.