Convenient Syntheses of Aryl and Perfluoroaryl Trichlorogermanes and Germatranes via an Organotin Route
摘要:
Aryl- and (perfluoroaryl)trichlorogermanes ArGeCl3 (Ar = C6H5, 2-FC6H4, 3,5-(CF3)(2)C6H3, C6F5, 2,3,5,6-F4C5N) are easily obtained in 60-80% yields from the corresponding tributylstannanes and GeCl4 (1:1) at 150 degreesC in the absence of a solvent. Although the tin-to-germanium transmetalation of C6F5 group is sluggish, it is facilitated by addition of 1-2 mol % AIBN (2,2'-azobis(isobutyronitrile)).
Convenient Syntheses of Aryl and Perfluoroaryl Trichlorogermanes and Germatranes via an Organotin Route
摘要:
Aryl- and (perfluoroaryl)trichlorogermanes ArGeCl3 (Ar = C6H5, 2-FC6H4, 3,5-(CF3)(2)C6H3, C6F5, 2,3,5,6-F4C5N) are easily obtained in 60-80% yields from the corresponding tributylstannanes and GeCl4 (1:1) at 150 degreesC in the absence of a solvent. Although the tin-to-germanium transmetalation of C6F5 group is sluggish, it is facilitated by addition of 1-2 mol % AIBN (2,2'-azobis(isobutyronitrile)).
Gold(<scp>i</scp>)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes
作者:Manjur O. Akram、Popat S. Shinde、Chetan C. Chintawar、Nitin T. Patil
DOI:10.1039/c8ob00630j
日期:——
Gold(I)-catalyzed cross-couplingreactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium
描述了金(I)催化的芳基重氮盐与有机锡烷的交叉偶联反应。这种氧化还原中性策略为各种联芳基,乙烯基芳烃和芳基乙炔提供了一种有效的方法。用NMR和ESI-MS监测反应为原位形成Ph 3 PAu I R(R =芳基,乙烯基和炔基)物种提供了有力证据,这对于激活芳基重氮盐至关重要。
Copper-catalyzed arylstannylation of arynes in a sequence
作者:Hideya Tanaka、Hitoshi Kuriki、Teruhiko Kubo、Itaru Osaka、Hiroto Yoshida
DOI:10.1039/c9cc02738f
日期:——
Copper-catalyzed arylstannylation of arynes has been developed. This transformation enables variously substituted ortho-stannylbiaryls and teraryls to be constructed straightforwardly. An electron-deficient tin center is the key, and thus the single or dual insertion of arynes into arylstannanes is precisely controllable by simply changing the equivalence of aryne precursors.
En Route to Stimuli-Responsive Boron-, Nitrogen-, and Sulfur-Doped Polycyclic Aromatic Hydrocarbons
作者:Valentin M. Hertz、Julian G. Massoth、Michael Bolte、Hans-Wolfram Lerner、Matthias Wagner
DOI:10.1002/chem.201602406
日期:2016.9.5
Replacing both meso carbon atoms of the polycyclic aromatic hydrocarbon (PAH) bisanthene by boron atoms creates an efficient blue fluorophore with a strong electron‐accepting character. The corresponding meso‐B,S‐doped bisanthene exhibits a solvent‐dependent green‐to‐orange photoluminescence and undergoes a reversible reduction at E =−2.06 V (vs. FcH/FcH+). After oxidation of the sulfur atom, the resulting
Synthesis, Ionisation Potentials and Electron Affinities of Hexaazatrinaphthylene Derivatives
作者:Stephen Barlow、Qing Zhang、Bilal R. Kaafarani、Chad Risko、Fabrice Amy、Calvin K. Chan、Benoit Domercq、Zoya A. Starikova、Mikhail Yu. Antipin、Tatiana V. Timofeeva、Bernard Kippelen、Jean-Luc Brédas、Antoine Kahn、Seth R. Marder
DOI:10.1002/chem.200601298
日期:2007.4.16
bis(trifluoromethyl)phenyl groups; DFT calculations suggest that the highly exothermic electronaffinity is due both to the replacement of the outermost phenylene rings of hexaazatrinaphthylene with thieno groups and to the presence of electron-withdrawing bis(trifluoromethyl)phenyl groups. The rather exothermic electronaffinities, the potential for adopting pi-stacked structures and the low intramolecular reorganisation