Hydroxy- and Aminophenyl Radicals from Arenediazonium Salts
作者:Gerald Pratsch、Christian A. Anger、Katharina Ritter、Markus R. Heinrich
DOI:10.1002/chem.201003713
日期:2011.4.4
Arenediazoniumsalts are well‐known sources of aryl radicals; however, the hydroxy‐ and amino‐substituted derivatives 1, 2, and 3, which lead to the respective formation of radicals 4, 5, and 6, have rarely been employed in synthetic organic chemistry so far. New synthetic applications of these species have been found, and the properties that may have previously hindered their successful use have been
Intramolecular annulation of aromatic rings with N-sulfonyl 1,2,3-triazoles: divergent synthesis of 3-methylene-2,3-dihydrobenzofurans and 3-methylene-2,3-dihydroindoles
作者:Xiang-Ying Tang、Yong-Sheng Zhang、Lv He、Yin Wei、Min Shi
DOI:10.1039/c4cc08343a
日期:——
The controllable synthesis of 3-methylene-2,3-dihydrobenzofurans2and 3-methylene-2,3-dihydroindoles5has been developed via cycloisomerization of N/O-tethered aryltriazoles.
An efficient palladium‐catalyzed decarboxylative ortho‐acylation of 2‐aryloxypyridines with α‐oxocarboxylicacids is described. In this new transformation, the aromatic C(sp2)H bond was successfully acylated to give diverse aromatic ketones regioselectively in moderate to good yields. The pyridine group can be removed easily after the acylation to give the corresponding 2‐hydroxy aromatic ketones
2-Substituted Benzo[b]furans from (E)-1,2-Dichlorovinyl Ethers and Organoboron Reagents: Scope and Mechanistic Investigations into the One-Pot Suzuki Coupling/Direct Arylation
作者:Laina M. Geary、Philip G. Hultin
DOI:10.1002/ejoc.201000787
日期:2010.10
phenols, boronic acids or other organoboron reagents, and trichloroethylene. The overall process requires only two synthetic steps, with the key step being a one-pot sequential Suzukicross-coupling/direct arylationreaction. The method tolerates many useful functional groups and does not require the installation of any other activating functionality. The modular nature of the process permits the rapid
Au-Catalyzed Biaryl Coupling To Generate 5- to 9-Membered Rings: Turnover-Limiting Reductive Elimination versus π-Complexation
作者:Tom J. A. Corrie、Liam T. Ball、Christopher A. Russell、Guy C. Lloyd-Jones
DOI:10.1021/jacs.6b10018
日期:2017.1.11
The intramolecular gold-catalyzed arylation of arenes by aryl-trimethylsilanes has been investigated from both mechanistic and preparative aspects. The reaction generates 5- to 9-membered rings, and of the 44 examples studied, 10 include a heteroatom (N, O). Tethering of the arene to the arylsilane provides not only a tool to probe the impact of the conformational flexibility of Ar-Au-Ar intermediates