Hydrophosphination of Propargylic Ethers with Diphenylphosphine in the Presence of LiHMDS,<i>N</i>-Heterocyclic Carbene, and Ti(NMe<sub>2</sub>)<sub>4</sub>
Regio- and stereoselective hydrophosphination of propargylic ethers with diphenylphosphine has been achieved using three-component catalyst, LiN(SiMe3)2/1,3-dimethylimidazol-2-ylidene/Ti(NMe2)4 (10 mol % of each).
Copper(I) complexes of N-alkyl-substituted N-Heterocyclic carbenes
作者:Laura Kuehn、Antonius F. Eichhorn、Todd B. Marder、Udo Radius
DOI:10.1016/j.jorganchem.2018.11.032
日期:2019.2
We report herein the synthetic routes to and spectroscopic and structuralcharacterization of a variety of copper complexes bearing small alkyl-substituted N-heterocyclic carbene (NHC) ligands. Complexes of the type [Cu(NHC)(X)] and [Cu(NHC)2(X)] (X = Cl) were readily synthesized by reaction of Cu(I)Cl with a variety of the carbenes. The molecular structures of the [Cu(NHC)(X)] complexes all show two-coordinate
N-Heterocyclic Carbene-Catalyzed Hydrosilylation of Styryl and Propargylic Alcohols with Dihydrosilanes
作者:Qiwu Zhao、Dennis P. Curran、Max Malacria、Louis Fensterbank、Jean-Philippe Goddard、Emmanuel Lacôte
DOI:10.1002/chem.201101822
日期:2011.8.29
Reducing alkenes to tears: Addition of structurally diverse N‐heterocyclic carbenes (NHCs) to silicon allows the reduction of propargylic and styryl alcohols through an organocatalyzed silylation/direct hydride transfer tandem reaction (see scheme). Catalytic turnover is enabled by the switch to and from hypervalent silicon. This provides a new synthetic application of NHC–main group element complexes
Beryllium bis(diazaborolyl): old neighbors finally shake hands
作者:T. Arnold、H. Braunschweig、W. C. Ewing、T. Kramer、J. Mies、J. K. Schuster
DOI:10.1039/c4cc08519a
日期:——
The synthesis of a linear beryllium bis(diazaborolyl) compound featuring the first non-cluster bond between boron and beryllium has been achieved through the reaction of Yamashita's lithium diazaborolide and BeCl2.
C–F bond activation of perfluorinated arenes using NHC-stabilized cobalt half-sandwich complexes
作者:Daniel Ertler、Maximilian W. Kuntze-Fechner、Simon Dürr、Katharina Lubitz、Udo Radius
DOI:10.1039/d0nj06137a
日期:——
8, [CpCo(iPr2Im)(C12F9)] 9, [Cp*Co(iPr2Im)(C6F5)] 10, [Cp*Co(iPr2Im)(C7F7)] 11 and [Cp*Co(iPr2Im)(C12F9)] 12 (Cp* = η5-C5CH3}5), Cp = η5-C5H5). The cobalt(II) fluoride [CpCo(iPr2Im)(F)] was detected as a side product of these reactions. The reaction of [CpCo(R22Im)(η2-C2H4)] (R2 = Me 1, iPr 2) with C6F6 and C7F8 at 60 °C afforded the dinuclear complexes [CpCo(R22Im)}2(μ-η2,η2-C6F6)] (R2 = Me 13, iPr