Metal-free oxidative decarbonylative coupling of aromatic aldehydes with arenes: direct access to biaryls
作者:Ren-Jin Tang、Qing He、Luo Yang
DOI:10.1039/c4cc10155c
日期:——
A metal-free oxidative decarbonylative coupling of aromatic aldehydes with electron-rich or electron-deficient arenes to produce biaryl compounds was developed. This novel coupling was proposed to proceed via a non-chain radical homolytic aromatic substitution (HAS) type mechanism, based on the substrate scope, ortho-regioselectivity, radical trapping experiments and DFT calculation studies. With the
Use of functionalized onium salts as a soluble support for organic synthesis
申请人:Vaultier Michel
公开号:US20070043234A1
公开(公告)日:2007-02-22
The invention relates to the use of a onium salt functionalized by at least one organic function, as a soluble support, in the presence of at least one organic solvent, for organic synthesis of a molecule, in a homogenous phase, by at least one transformation of said organic function. The onium salt enables the synthesized molecule to be released. The onium salt is present in liquid or solid form at room temperature and corresponds to formula A
1
+
, X
1
−
, wherein A
1
+
represents a cation and X
1
−
represents an anion.
<i>meta</i>
‐Selective C−H Arylation of Fluoroarenes and Simple Arenes
作者:Luo‐Yan Liu、Jennifer X. Qiao、Kap‐Sun Yeung、William R. Ewing、Jin‐Quan Yu
DOI:10.1002/anie.202002865
日期:2020.8.10
to promote ortho‐C−H metalation. Based upon this reactivity, we employed an activated norbornene that traps the ortho‐palladation intermediate and is then relayed to the meta position, leading to meta‐selective C−H arylation of fluoroarenes. Deuterium experiment suggests that this meta‐arylation is initiated by ortho C−H activation and the catalytic cycle is terminated by C‐2 protonation. A dual‐ligand
Photosensitizer-Free, Gold-Catalyzed C-C Cross-Coupling of Boronic Acids and Diazonium Salts Enabled by Visible Light
作者:Sina Witzel、Jin Xie、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/adsc.201700121
日期:2017.5.2
The first photosensitizer‐free visiblelight‐driven, gold‐catalyzed C–C cross‐couplings of arylboronic acids and aryldiazonium salts are reported. The reactions can be conducted under very mild conditions, using a catalytic amount of tris(4‐trifluoromethyl)phosphinegold(I) chloride [(4‐CF3‐C6H4)3PAuCl] with methanol as the solvent allowing an alternative access to a variety of substituted biaryls in
据报道,第一个无光敏剂的可见光驱动的,金催化的芳基硼酸和芳基重氮盐的CC交联反应。该反应可以在非常温和的条件下进行,使用催化量的三(4-三氟甲基)膦金(I)氯化物[(4-CF 3 -C 6 H 4)3 PAuCl],甲醇为溶剂,可以选择使用以中等至优异的收率合成各种取代的联芳基,并具有宽泛的官能团耐受性。
[EN] GOLD-CATALYZED C-C CROSS-COUPLING OF BORON- AND SILICON-CONTAINING ARYL COMPOUNDS AND ARYLDIAZONIUM COMPOUNDS BY VISIBLE-LIGHT<br/>[FR] COUPLAGE CROISÉ C-C CATALYSÉ PAR L'OR DE COMPOSÉS ARYLE CONTENANT DU BORE ET DU SILICIUM ET DE COMPOSÉS ARYLDIAZONIUM PAR LUMIÈRE VISIBLE
申请人:UNIV HEIDELBERG
公开号:WO2018114914A1
公开(公告)日:2018-06-28
The present invention relates to a method for producing (functionalized) biaryls by employing a visible-light-driven, gold-catalyzed C-C cross-coupling reaction system involving boron- and silicon-containing aryl compounds and aryldiazonium compounds. Moreover, the present invention relates to the use of such boron- and silicon-containing aryl compounds and aryldiazonium compounds, as well as related gold catalysts, in the manufacture of (functionalized) biaryls.