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)。
Rhodium(III)-Catalyzed Direct C–H Arylation of Various Acyclic Enamides with Arylsilanes
作者:Xiaolan Li、Kai Sun、Wenjuan Shen、Yong Zhang、Ming-Zhu Lu、Xuzhong Luo、Haiqing Luo
DOI:10.1021/acs.orglett.0c03578
日期:2021.1.1
The stereoselective β-C(sp2)–H arylation of various acyclic enamides with arylsilanes via Rh(III)-catalyzed cross-coupling reaction was illustrated. The methodology was characterized by extraordinary efficacy and stereoselectivity, a wide scope of substrates, good functional group tolerance, and the adoption of environmentally friendly arylsilanes. The utility of this present method was evidenced by
Enantioselective palladium-catalysed conjugate addition of arylsiloxanes
作者:Francesca Gini、Bart Hessen、Ben L. Feringa、Adriaan J. Minnaard
DOI:10.1039/b616969d
日期:——
The complex formed from Pd(CH3CN)4(BF4)2 and (R,R)-MeDUPHOS is a highly enantioselective catalyst for the asymmetric conjugate addition of aryltriethylsiloxanes to a variety of unsaturated ketones, lactones and lactams.
Improved Synthesis of Aryltriethoxysilanes via Palladium(0)-Catalyzed Silylation of Aryl Iodides and Bromides with Triethoxysilane
作者:Amy S. Manoso、Philip DeShong
DOI:10.1021/jo010621q
日期:2001.11.1
silylation of aryl halides with triethoxysilane has been expanded to include aryl bromides. A more general Pd(0) catalyst/ligand system has been developed that activates bromides and iodides: palladium(0) dibenzylideneacetone (Pd(dba)(2)) is activated with 2-(di-tert-butylphosphino)biphenyl (Buchwald's ligand) (1:2 mol ratio of Pd/phosphine). Electron-rich para- and meta-substituted aryl halides (including
Preparation and Palladium-Catalyzed Cross-Coupling of Aryl Triethylammonium Bis(catechol) Silicates with Aryl Triflates
作者:W. Michael Seganish、Philip DeShong
DOI:10.1021/jo035309q
日期:2004.2.1
Pentavalent aryl and heteroaryl bis(catechol) silicates undergo palladium-catalyzedcross-coupling with aryl and heteroaryl triflates in the presence of a fluoride source in excellent yields. These solid, air-stable bis(catechol) silicates are prepared from a high-yielding displacement reaction between catechol and an aryl siloxane in the presence of an amine base. The cross-couplingreaction is tolerant
Nickel-Catalyzed Monofluoroalkylation of Arylsilanes via Hiyama Cross-Coupling
作者:Yun Wu、Hao-Ran Zhang、Yi-Xuan Cao、Quan Lan、Xi-Sheng Wang
DOI:10.1021/acs.orglett.6b02803
日期:2016.11.4
first example of nickel-catalyzed monofluoroalkylation of arylsilanes has been developed with readily available fluoroalkyl halides. This novel transformation has demonstrated high reactivity, broad substrate scope, excellent functional group tolerance, and mild reaction conditions. The selective activation of a relatively inert C–Si bond for slow release of aryl carbanion is the key reason for reducing