Regioselective catalytic conversion of hydrocarbons to versatile synthetic reagents via C-H bond functionalization
申请人:Johnson Samuel A.
公开号:US20110282087A1
公开(公告)日:2011-11-17
The present invention provides a novel and improved method of functionalizing a C—H bond of an arene compound comprising the step of reacting an organometallic compound having a group 14 element with the arene compound having at least one hydrogen bonded to a carbon in the presence of a catalyst.
Carbon–Hydrogen Bond Stannylation and Alkylation Catalyzed by Nitrogen-Donor-Supported Nickel Complexes: Intermediates with Ni–Sn Bonds and Catalytic Carbostannylation of Ethylene with Organostannanes
作者:Meghan E. Doster、Samuel A. Johnson
DOI:10.1021/om4003889
日期:2013.8.12
product. The catalytic intermediate (MeNC5H4NiPr)Ni(η2-H2C═CHSnR3)2 (2R) was observed by NMR spectroscopy and isolated in the case of R = Ph. A second catalytic intermediate, cis-(MeNC5H4NiPr)2Ni(C6F5)(SnR3) (4R), was observed by NMR spectroscopy and isolated for R = Bn, Ph by the reaction of C6F5SnR3 with MeNC5H4NiPr and Ni(COD)2. The reaction of C6F5SnR3 with ethylene in the presence of catalytic MeNC5H4NiPr
Ni(COD)2和氮供体辅助配体MeNC 5 H 4 N i Pr催化H 2 C = CHSnR 3与C 6 F 5 H的反应,其中R = Bu,Bn,Ph 。这些反应产生了锡烷基化产物C 6 F 5 SnR 3(1 R)和CH烷基化产物C 6 F 5 CH 2 CH 2 SnR 3(3 R)。Bu取代基提供最佳的甲氧基化选择性,而Ph取代基主要提供烷基化产物。催化中间体(MENC 5 ħ 4 Ñ我PR)的Ni(η 2 -H 2 C═CHSnR 3)2(2 - [R )用NMR光谱观察和在R =博士的情况下分离。第二催化中间体,顺-(MeNC 5 H 4 N i Pr)2 Ni(C 6 F 5)(SnR 3)(4 R),通过NMR光谱进行观察,并通过C 6 F 5 SnR 3与MeNC 5 H 4 N i Pr和Ni(COD)2的反应分离出R = Bn,Ph 。C的反应6 ˚F 5 SNR
Selective CF Bond Activation of Tetrafluorobenzenes by Nickel(0) with a Nitrogen Donor Analogous to N-Heterocyclic Carbenes
作者:Meghan E. Doster、Samuel A. Johnson
DOI:10.1002/anie.200806048
日期:2009.3.9
N, not NHC: A neutral, basic, strong σ‐donor nitrogen ancillary ligand with properties analogous to those of N‐heterocyclic carbenes (NHCs) was developed to aid in the oxidative additions of challenging substrates to late transition metals. Selective, room‐temperature CF bondactivation was observed with hexa‐, penta‐, and all three isomers of tetrafluorobenzene using a nickel(0) source in the presence