Continuous-flow Si–H functionalizations of hydrosilanes <i>via</i> sequential organolithium reactions catalyzed by potassium <i>tert</i>-butoxide
作者:Hyune-Jea Lee、Changmo Kwak、Dong-Pyo Kim、Heejin Kim
DOI:10.1039/d0gc03213a
日期:——
tri-functionalizations of unactivated hydrosilanes via serial organolithiumreactions catalyzed by earth-abundant metal compounds. Based on the screening of various additives, we found that catalytic potassium tert-butoxide (t-BuOK) facilitates the rapid reaction of organolithiums with hydrosilanes. Using a flow microreactor system, various organolithiums bearing functional groups were efficiently generated
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.
Formal Nucleophilic Silyl Substitution of Aryl Halides with Silyllithium Reagents via Halogenophilic Attack of Silyl Nucleophiles
作者:Hajime Ito、Eiji Yamamoto、Satoshi Ukigai
DOI:10.1055/s-0036-1590835
日期:2017.11
developed for the formal nucleophilic silyl substitution of aryl halides with silyllithium or silylpotassium reagents. Dimethylphenylsilyllithium reacted with various aryl halides to form the corresponding arylsilanes in moderate to good yields with concomitant formation of the disilanes under the optimized reaction conditions. Mechanistic studies indicated that this silyl substitution reaction progresses