Transition-Metal-Free C3 Arylation of Indoles with Aryl Halides
作者:Ji Chen、Jimmy Wu
DOI:10.1002/anie.201612311
日期:2017.3.27
We report an unprecedented transitionmetal‐free coupling of indoles with aryl halides. The reaction is promoted by KOtBu and is regioselective for C3 over N. The use of degassed solvents devoid of oxygen is necessary for the success of the transformation. Preliminary studies implicate a hybrid mechanism that involves both aryne intermediates and non‐propagative radical processes. Electron transfer
The Reaction Pattern of the MoCl5-Mediated Oxidative Aryl-aryl Coupling
作者:Siegfried R. Waldvogel
DOI:10.1055/s-2002-22708
日期:——
The oxidative coupling of electron rich aryls by molybdenum pentachloride is reported. The stoichiometry of the coupling reaction reveals that MoCl5 is a single electron acceptor. Interestingly, the 1,2-dialkoxy substitution pattern is pivotal for the aryl-aryl coupling.
Biotransformation of diphenyl ether by the yeastTrichosporon beigelii SBUG 752
作者:Frieder Schauer、Kirsten Henning、Helmut Pscheidl、Rolf M. Wittich、Peter Fortnagel、Heinz Wilkes、Volker Sinnwell、Wittko Francke
DOI:10.1007/bf00695348
日期:1995.6
SBUG 752 was able to transform diphenylether. By TLC, HPLC, GC, GC-MS, NMR- and UV-spectroscopy, several oxidation products were identified. The primary attack was initiated by a monooxygenation step, resulting in the formation of 4-hydroxydiphenyl ether, 2-hydroxydiphenyl ether and 3-hydroxydiphenyl ether (48:47:5). Further oxidation led to 3,4-dihydroxydiphenyl ether. As a characteristic product resulting