1,3-γ-Silyl-elimination in electron-deficient cationic systems
作者:Michael A. Mercadante、Christopher B. Kelly、Trevor A. Hamlin、Kayla R. Delle Chiaie、Michael D. Drago、Katherine K. Duffy、Megan T. Dumas、Diana C. Fager、Bryanna L. C. Glod、Katherine E. Hansen、Cameron R. Hill、Rebecca M. Leising、Catherine L. Lynes、Allyson E. MacInnis、Madeline R. McGohey、Stephanie A. Murray、Marc C. Piquette、Shaina L. Roy、Ryan M. Smith、Katherine R. Sullivan、Bao H. Truong、Kristina M. Vailonis、Vitaliy Gorbatyuk、Nicholas E. Leadbeater、Leon J. Tilley
DOI:10.1039/c4sc01732c
日期:——
an electron-withdrawing trifluoromethyl group (–CF3) at a putative cationic centre enhances γ-silyl neighbouring-group participation (NGP). In stark contrast to previously studied γ-silyl-substituted systems, the preferred reaction pathway is 1,3-γ-silyl elimination, giving ring closure over solvent substitution or alkene formation. The scope of this cyclopropanation reaction is explored for numerous
Synthesis, Crystal Structure, and Biological Property of a Novel Dinuclear Copper(II) Complex
作者:Chao Li、Xu-Feng Meng、Wei-Ning Li、Xin Zhou、Jing-Jun Ma
DOI:10.1080/15533174.2014.963238
日期:2016.2.1
2-acetylpyridine, cyclohexylamine and copper(II) perchlorate in methanol resulted in the dinuclearcopper(II) complex [Cu2L2]·2ClO4, where L is the monoanionic form of 1-methoxy-1,3-dipyridin-2-ylbutane-1,3-diol. The complex was characterized by elemental analysis and IR spectroscopic method in the solid state. Single-crystal X-ray analysis was performed, which indicated that the complex possesses a crystallographic
2-乙酰基吡啶,环己胺和高氯酸铜(II)在甲醇中的反应生成双核铜(II)络合物[Cu 2 L 2 ]·2ClO 4,其中L是1-甲氧基-1,3-的单阴离子形式二吡啶-2-基丁烷-1,3-二醇 通过元素分析和红外光谱法对固体进行了表征。进行了单晶X射线分析,表明该络合物具有晶体学反演中心对称性。络合物中的Cu原子呈方形金字塔形。研究了该菌株对枯草芽孢杆菌,大肠杆菌和金黄色葡萄球菌的热行为和生物学特性。
Iron and ruthenium complexes [M2(CO)6(pyridine-2-carbaldehyde-imine)] having a σ-N,μ2-N′, η2-CN′ bonded 6-R1-py-2-C(R2)NR ligand; x-ray structure of [Ru2(CO)5 &{1,2-bis(μ-isopropylamido)-1,2-bis(2-pyridyl)ethane}] containing two C|C linked pyridine-2-carbaldehyde-imine ligands
作者:Louis H. Polm、Gerard van Koten、Cornelis J. Elsevier、Kees Vrieze、Bernard F.K. Van Santen、Casper H. Stam
DOI:10.1016/0022-328x(86)80154-1
日期:1986.5
Reductive Disproportionation of Carbon Dioxide by an Alkyl-Functionalized Pyridine Monoimine Re(I) <i>fac</i>-Tricarbonyl Electrocatalyst
作者:Charles W. Machan、Steven A. Chabolla、Clifford P. Kubiak
DOI:10.1021/acs.organomet.5b00406
日期:2015.10.12
A Re(I) fac-tricarbonyl complex with a 2-(2-cyclohexyl-1-methyl)-methylimino-pyridine ligand is found to electrocatalyze the reductive disproportionation of two equivalents of CO2 to CO and CO32-. Electrochemical and spectroelectrochemical experiments, supplemented by stoichiometric reactions with chemically reduced species, indicate that this reaction is catalyzed via a process that is first-order in [Re]. These findings show that the decreased aromaticity of pyridine monoimine ligands (relative to that of previously studied bipyridine systems) has mechanistic implications for the electrocatalytic reduction of CO2 with Re complexes. NMR experiments indicate that this is also manifested in a competing pathway where CO2 undergoes a reductive insertion reaction into the monoamine ligand.