Primary Radical Formation in Irradiated Proteins

Nature ◽  
1965 ◽  
Vol 206 (4991) ◽  
pp. 1314-1315 ◽  
Author(s):  
B. B. SINGH ◽  
M. G. ORMEROD
Keyword(s):  
Radical Formation ◽  
Primary Radical

Environmental Effects on Primary Radical Formation in Guanine: Solid-State ESR and ENDOR of Guanine Hydrobromide Monohydrate

1991 ◽  
Vol 125 (2) ◽  
pp. 119 ◽  
Author(s):  
Eli O. Hole ◽  
Einar Sagstuen ◽  
William H. Nelson ◽  
David M. Close
Keyword(s):  
Solid State ◽  
Environmental Effects ◽  
Radical Formation ◽  
Primary Radical

Photocatalytic Alkylation of Pyrroles and Indoles with α-Diazo Esters

2019 ◽  
Author(s):  
Łukasz Ciszewski ◽  
Jakub Durka ◽  
Dorota Gryko
Keyword(s):  
Aromatic Compounds ◽  
Reaction Pathway ◽  
Alkylating Agents ◽  
Catalytic Amount ◽  
Radical Formation ◽  
Reaction Selectivity ◽  
Diazo Esters ◽  
Electron Withdrawing Substituents

This article describes direct photoalkylation of electron-rich aromatic compounds with diazo compoiunds. C-2 alkylated indoles and pyrroles are obtained with good yields even though the photocatalyst (Ru(bpy)3Cl2) loading is as low as 0.075 mol %. For substrates bearing electron-withdrawing substituents the addition of a catalytic amount of N,N-dimethyl-4-methoxyaniline is required. Both EWG-EWG and EWG-EDG substituted diazo esters are suitable as alkylating agents. The reaction selectivity and mechanistic experiments suggest that carbenes/carbenoid intermediates are not involved in the reaction pathway, instead radical formation is proposed.

Visible Light-Induced Sulfonylation/Arylation of Styrenes in a Double Radical Three-Component Photoredox Reaction

2019 ◽  
Author(s):  
Benjamin Lipp ◽  
Lisa Marie Kammer ◽  
Murat Kucukdisli ◽  
Adriana Luque ◽  
Jonas Kühlborn ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Formation ◽  
Three Component Reaction ◽  
Broad Variety ◽  
Styrene Derivatives ◽  
Mechanistic Investigations

Simultaneous sulfonylation/arylation of styrene derivatives is achieved in a photoredox-catalyzed three-component reaction using visible light. A broad variety of difunctionalized products is accessible in mostly excellent yields and high diastereoselectivity. The developed reaction is scalable and suitable for the modification of styrene-functionalized biomolecules. Mechanistic investigations suggest the transformation to be operating through a designed sequence of radical formation and radical combination.<br>

In vivo thiyl free radical formation from hemoglobin following administration of hydroperoxides

1990 ◽  
Vol 277 (2) ◽  
pp. 402-409 ◽  
Author(s):  
Kirk R. Maples ◽  
Christopher H. Kennedy ◽  
Sandra J. Jordan ◽  
Ronald P. Mason
Keyword(s):  
Free Radical ◽  
Radical Formation ◽  
Free Radical Formation

A New Estimation of Primary Radical Termination Rate

1980 ◽  
Vol 13 (1) ◽  
pp. 193-194 ◽  
Author(s):  
Katsukiyo Ito
Keyword(s):  
Primary Radical ◽  
Termination Rate
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