Aryl radical formation during the thermal decomposition of aryldizao alkyl ethers

1977 ◽  
pp. 769 ◽  
Author(s):  
R. Michael Paton ◽  
Rudolf U. Weber
Keyword(s):  
Thermal Decomposition ◽  
Radical Formation ◽  
Aryl Radical ◽  
Alkyl Ethers

Thermal Decomposition of Phenyl Alkyl Ethers

1989 ◽  
Vol 331 (6) ◽  
pp. 923-930 ◽  
Author(s):  
B. Ondruschka ◽  
U. Engelstädter ◽  
D. Vorwerk ◽  
G. Zimmermann
Keyword(s):  
Thermal Decomposition ◽  
Alkyl Ethers

Koordinationsverhalten des Pentafluorphenylxenonium Salzes [C6F5Xe]+[AsF6]- gegenüber Pyridinen unterschiedlicher Basizität / Co-ordinative Behaviour of the Pentafluorophenylxenonium Salt [C6F5Xe]+[AsF6]- to Pyridines of Different Basicity

1995 ◽  
Vol 50 (12) ◽  
pp. 1799-1810 ◽  
Author(s):  
Hermann Josef Frohn ◽  
Thorsten Schroer ◽  
Gerald Henkel
Keyword(s):  
Thermal Decomposition ◽  
Structure Analysis ◽  
Coupling Constants ◽  
Radical Formation ◽  
Pyridinium Salts ◽  
X Ray

The arylxenonium cation in the salt [C6F5Xe]+ [AsF6]- is isoelectronic to C6F5I, but coordinatively unsaturated with respect to N-bases like MeCN and pyridines. Co-ordination of strongly basic pyridines causes weakening of the Xe-C bond and C6F1 radical formation. The thermal decomposition of pyridine co-ordinated arylxenonium cations gives three groups of products: C-pentafluorophenylated pyridines, N-pentafluorophenylated pyridinium and N-protonated pyridinium salts. The co-ordination ability of the different pyridines shows a good correlation (C6F5 group) with the 19F NMR shift values of the p-F atom and the coupling constants 3J (19F-129Xe). An X-ray structure analysis was performed for the co-ordination product [C6F5Xe · 2,6-C5H3F2N ]+ [AsF6]- and for [C6F5-C5H5N]+ [(C6F5)2BF2]-, which was obtained by thermolysis of the corresponding adduct.

Halogen bonding matters: visible light-induced photoredox catalyst-free aryl radical formation and its applications

2020 ◽  
Vol 22 (18) ◽  
pp. 10212-10218 ◽  
Author(s):  
Rong Miao ◽  
Dan Wang ◽  
Jianliang Xiao ◽  
Jiani Ma ◽  
Dong Xue ◽  
...  
Keyword(s):  
Visible Light ◽  
Aryl Halide ◽  
Halogen Bonding ◽  
Radical Formation ◽  
Aryl Radical ◽  
Catalyst Free ◽  
Visible Light Driven

Halogen bonding facilitated aryl halide activation for photoredox catalyst-free visible light-driven reactions.

scholarly journals Mild, visible light-mediated decarboxylation of aryl carboxylic acids to access aryl radicals

2017 ◽  
Vol 8 (5) ◽  
pp. 3618-3622 ◽  
Author(s):  
L. Candish ◽  
M. Freitag ◽  
T. Gensch ◽  
F. Glorius
Keyword(s):  
Visible Light ◽  
Carboxylic Acids ◽  
Radical Formation ◽  
Photoredox Catalysis ◽  
Aryl Radical ◽  
Aryl Radicals

Herein we present the first example of aryl radical formation via the visible light-mediated decarboxylation of aryl carboxylic acids using photoredox catalysis.

Radical C‒N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent

2019 ◽  
Author(s):  
Yuanhong Ma ◽  
Yue Pang ◽  
jan niski ◽  
Markus Leutzsch ◽  
Josep Cornella
Keyword(s):  
Aromatic Amines ◽  
Driving Force ◽  
Bond Cleavage ◽  
Radical Reaction ◽  
Radical Formation ◽  
Planar Structure ◽  
Amino Group ◽  
Aryl Radical ◽  
Electronic Environment

Herein, we report a radical borylation of aromatic amines through a homolytic C(sp2)‒N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent (ScPyry-OTf) thus priming the amino group for reactivity. The combination of terpyridine and a diboron reagent triggers a radical reaction which cleaves the C(sp2)‒N bond and forges a new C(sp2)‒B bond. The unique non-planar structure of the pyridinium intermediate, provides the necessary driving force for the aryl radical formation. The method permits borylation of a wide variety of aromatic amines indistinctively of the electronic environment.<br>

The pathways for thermal decomposition of aryl alkyl ethers during coal pyrolysis

Fuel ◽  
1989 ◽  
Vol 68 (10) ◽  
pp. 1349-1353 ◽  
Author(s):  
Kuntal Chatterjee ◽  
Leon M. Stock ◽  
Robert F. Zabransky
Keyword(s):  
Thermal Decomposition ◽  
Coal Pyrolysis ◽  
Alkyl Ethers
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