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。
Highly Enantioselective Construction of Multifunctional Silicon‐Stereogenic Silacycles by Asymmetric Enamine Catalysis
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.