Kinetic Study of the 7-endo Selective Radical Cyclization of N-tert-Butyl-o-bromobenzylmethacryl Amides: Kinetic Investigation of the Cyclization and 1,7-Hydrogen Transfer of Aromatic Radicals

2013 ◽  
Vol 78 (8) ◽  
pp. 3961-3971 ◽  
Author(s):  
Akio Kamimura ◽  
Tomoko Kotake ◽  
Yuriko Ishihara ◽  
Masahiro So ◽  
Takahiro Hayashi
Keyword(s):  
Kinetic Study ◽  
Hydrogen Transfer ◽  
Radical Cyclization ◽  
Kinetic Investigation ◽  
Tert Butyl ◽  
Aromatic Radicals

Kinetische Untersuchungen zur Wasserstoffübertragung von Dihydropyridinen auf Hydrazyle / Kinetic Investigation on the Hydrogen Transfer from Dihydropyridines to Hydrazyls

1981 ◽  
Vol 36 (3) ◽  
pp. 391-394 ◽  
Author(s):  
G. Abou-Elenien ◽  
J. Rieser ◽  
N. Ismail ◽  
K. Wallenfels
Keyword(s):  
Kinetic Study ◽  
Hydrogen Transfer ◽  
Second Order ◽  
Kinetic Investigation ◽  
Redox Potentials ◽  
Solvent Medium

Abstract The results of a kinetic study on the hydrogen transfer between different dihydropyridines and mono-, bis-and trishydrazyls of the tricyanobenzene series are described. The reactions have been found to obey in all cases a second-order law. The influences of solvent medium, redox-potentials of the reactants and temperature on the rates of reactions have been investigated.

The long and winding road to new porphycenes

2012 ◽  
Vol 16 (05n06) ◽  
pp. 589-602 ◽  
Author(s):  
Igor Czerski ◽  
Arkadiusz Listkowski ◽  
Jan Nawrocki ◽  
Natalia Urbańska ◽  
Hubert Piwoński ◽  
...  
Keyword(s):  
Fluorescence Polarization ◽  
Hydrogen Transfer ◽  
Single Molecules ◽  
Tert Butyl ◽  
Tautomeric Forms ◽  
By Products ◽  
Double Hydrogen

We describe attempts — not always successful — made over the years to improve the efficiency of porphycene synthesis and to produce novel compounds, custom-designed for specific purposes. New porphycenes are reported, some of them obtained rather unexpectedly as by-products of the planned reactions. Structure and energy computations of possible tautomeric forms in porphycenes substituted by one, two, three, and four tert-butyl groups lead to predictions regarding the kinetics and mechanisms of intramolecular double hydrogen transfer. The occurrence of tautomerization in single molecules of tert-butylsubstituted porphycenes is demonstrated by using fluorescence polarization techniques.

Radical Cyclization and 1,5-Hydrogen Transfer in Selected Aromatic Diazonium Salts

Heterocycles ◽  
2014 ◽  
Vol 89 (1) ◽  
pp. 83 ◽  
Author(s):  
Giuseppe Daidone ◽  
Benedetta Maggio ◽  
Gianfranco Fontana ◽  
Demetrio Raffa ◽  
Francesco Ferrante
Keyword(s):  
Hydrogen Transfer ◽  
Radical Cyclization ◽  
Diazonium Salts
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