Nickel/copper-cocatalyzed decarbonylative silylation of acyl fluorides
作者:Xiu Wang、Zhenhua Wang、Yasushi Nishihara
DOI:10.1039/c9cc05325e
日期:——
Ni/Cu-cocatalyzed decarbonylative silylation of acyl fluorides with silylboranes has been developed to afford various arylsilanes with high efficiency and good functional-group compatibility via carbon–fluorine bond cleavage and carbon–siliconbond formation. Such transformation can not only extend the functionalization type of acyl fluorides but complement the synthetic route for arylsilanes.
The iron-catalyzed construction of Csp2–Si bonds via unreactive C–O bonds possesses a challenging topic in organic chemistry. Herein we report an iron-catalyzed silylation of aryl and alkenylcarbamates via C–O bond activation. This protocol features high efficiency and a broad substrate scope, enabling the late-stage silylation of biorelevant compounds and thus providing a good method to access valuable
Catalytic reduction of aryl trialkylammonium salts to aryl silanes and arenes
作者:Alexander W. Rand、John Montgomery
DOI:10.1039/c9sc01083a
日期:——
A new approach for the reduction of aryl ammonium salts to arenes or aryl silanes using nickel catalysis is reported. This method displays excellent ligand-controlled selectivity based on the N-heterocyclic carbene (NHC) ligand employed. Utilizing a large NHC in non-polar solvents generates aryl silanes, while small NHCs in polar solvents promote reduction to arenes. Several classes of aryl silanes
Silylarene Hydrogenation: A Strategic Approach that Enables Direct Access to Versatile Silylated Saturated Carbo‐ and Heterocycles
作者:Mario P. Wiesenfeldt、Tobias Knecht、Christoph Schlepphorst、Frank Glorius
DOI:10.1002/anie.201804124
日期:2018.7.2
by arene hydrogenation. The scope includes alkoxy‐ and halosilyl substituents. Silyl groups can be derivatized into a plethora of functionalities and find application in organic synthesis, materials science, and pharmaceutical, agrochemical, and fragrance research. However, silylated saturated (hetero‐ ) cycles are difficult to access with current technologies. The yield of the hydrogenation depends
我们报告了一种通过芳烃加氢将易得的甲硅烷基化芳烃转化为甲硅烷基化饱和碳和杂环的方法。范围包括烷氧基和卤代甲硅烷基取代基。甲硅烷基可被衍生为多种功能,并在有机合成,材料科学以及制药,农业化学和香料研究中得到应用。但是,目前的技术很难获得甲硅烷基化的饱和(杂)循环。氢化的产率取决于硅胶添加剂的量。这种二氧化硅效应还可以显着改善以前公开的高度氟化芳烃的氢化方法(例如,氢化至全顺式C 6 H 6 F 6)。
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