Cu<sup>I</sup>
-Catalyzed Pentafluoroethylation of Aryl Iodides in the Presence of Tetrafluoroethylene and Cesium Fluoride: Determining the Route to the Key Pentafluoroethyl Cu<sup>I</sup>
Intermediate
The Cu(I)‐catalyzed pentafluoroethylation of iodoarenes via the fluorocupration of tetrafluoroethylene (TFE) is disclosed. The active species, (phen)CuC2F5, was isolated and its molecular structure confirmed by a single‐crystal X‐ray diffraction analysis. The key to the successful suppression of the competing oligomerization of TFE is to refrain from stirring the reaction mixture. A mechanistic study
公开了通过四氟乙烯(TFE)的氟代杯化反应,由铜(I)催化的碘代芳烃的五氟乙基化。分离了活性物质(phen)CuC 2 F 5,并通过单晶X射线衍射分析确认了其分子结构。成功抑制TFE竞争性低聚的关键是避免搅拌反应混合物。机理研究清楚地放弃了催化反应通过自由基途径进行的可能性。
Studies on the oxygenolysis of 9,10-phenanthrenequinone by CuXL (X = Cl or Br; L = pyridine, 2,2′-bipyridine, and 1,10-phenanthroline) complexes
作者:Gábor Speier、Zoltán Tyeklár
DOI:10.1039/dt9830001995
日期:——
The oxygenolysis of 9,10-phenanthrenequinone by CuXL [X = Cl or Br; L = pyridine (py), 2,2′-bipyridine (bipy), and 1,10-phenanthroline (phen)] to well defined mixed-ligand diphenatocomplexes [Cu2X2(C14H8O4)Ln](n= 4, L = py; n= 2, L = bipy or phen) is reported. In the reaction of the quinone with preformed copper–dioxygen complexes under argon half of the copper was converted into the diphenatocopper
CuXL [X = Cl或Br; L =吡啶(py),2,2'-联吡啶(bipy)和1,10-菲咯啉(phen)]为定义明确的混合配体联苯复合物[Cu 2 X 2(C 14 H 8 O 4)L n ] (n = 4,L = py;n = 2,L = bipy或phen)。在氩气下,醌与预先形成的铜-二氧配合物反应,一半的铜被转化为苯乙酮配合物,另一半被分离为CuXL或CuXL 3配合物。讨论了氧解的可能模式。
Alkoxyl Radical-Mediated Ring Expansion/1,4-Difunctionalization of 1,3-Enynes upon Copper Catalysis
involving alkoxyl radical-mediated ring expansion/1,4-difunctionalization of 1,3-enynes was developed, offering a straightforward approach to the tetra-substituted allenes with macrolactone, CN, and CF3 functional groups. Remarkably, incorporation of the NH2 group onto the 1,3-enyne moiety enabled further cyclization to give a unique scaffold containing a lactone and an indole moiety.
Abstract Four new examples of coppercomplexes [Cu(L1)2(H2O)4] (1), [Cu(HL1)2(H2O)2](NO3)2 (2), [Cu(HL1)Cl]∞ (3), [Cu(HL2)(phen)(H2O)](NO3)·3(H2O) (4) with HL1 = vitamin B3, H2L2 = 2-hydroxy-vitamin B3, phen = 1,10-phenanthroline, were synthesized and their structures solved by single crystal X-ray diffraction. For all complexes, vitamin B3 acts as monodentate ligand through the N atom from pyridyl
Hydrothermal synthesis, structure, and characterization of two one-dimensional chainlike hybrid complexes [(CuX)2(o-phen)]∞ (X=Br, Cl; o-phen=o-phenanthroline)
作者:Shutao Wang、Enbo Wang、Yu Hou、Yangguang Li、Mei Yuan、Nihai Hu
DOI:10.1016/s0020-1693(03)00079-3
日期:2003.6
Two novel organic-inorganic hybrid complexes [(CuX)(2)(o-phen)](infinity) (X = Br (1), Cl (2); o-phen = o-phenanthroline) have been synthesized hydrothermally and characterized structurally by elemental analyses, IR, ESR, XPS spectrum, TG analyses and single-crystal X-ray diffraction. Both title compounds exhibit novel one-dimensional chainlike copper halide scaffolding constructed by the unusual [Cu3X3] hexagon motifs by sharing opposite edges, where a single Cu site of each [Cu3X3] hexagon is chelated with N donors of o-phen group. To our knowledge, such basic o-phen-copper halide skeleton has not been reported hitherto. Moreover, TG analyses indicate that both title compounds possess high thermal stability. (C) 2003 Elsevier Science B.V. All rights reserved.