Pattern of hydroxyl radical addition to cytosine and 1-, 3-, 5-, and 6-substituted cytosines. Electron transfer and dehydration reactions of the hydroxyl adducts

1983 ◽  
Vol 105 (13) ◽  
pp. 4380-4386 ◽  
Author(s):  
D. K. Hazra ◽  
S. Steenken
Keyword(s):  
Electron Transfer ◽  
Hydroxyl Radical ◽  
Radical Addition ◽  
Dehydration Reactions

Hydroxyl Radical Addition to Thymine and Cytosine and Photochemistry of the Adducts at the C6 Position

ChemPhotoChem ◽  
2019 ◽  
Vol 3 (9) ◽  
pp. 889-896 ◽  
Author(s):  
Vicent J. Borràs ◽  
Antonio Francés‐Monerris ◽  
Daniel Roca‐Sanjuán
Keyword(s):  
Hydroxyl Radical ◽  
Radical Addition

Molecular structure effects on the kinetics of hydroxyl radical addition to azo dyes

2002 ◽  
Vol 15 (5) ◽  
pp. 287-292 ◽  
Author(s):  
Hugo Destaillats ◽  
Adrián G. Turjanski ◽  
Darío A. Estrin ◽  
Michael R. Hoffmann
Keyword(s):  
Molecular Structure ◽  
Hydroxyl Radical ◽  
Azo Dyes ◽  
Radical Addition ◽  
Kinetics Of

scholarly journals Semiconductors as sensitisers for the radical addition of tertiary amines to electron deficient alkenes

2003 ◽  
Vol 5 (3) ◽  
pp. 175-182 ◽  
Author(s):  
Siniša Marinković ◽  
Norbert Hoffmann
Keyword(s):  
Electron Transfer ◽  
Organic Synthesis ◽  
Radical Reaction ◽  
Heterogeneous Photocatalysis ◽  
Radical Addition ◽  
Point Of View ◽  
Tertiary Amines ◽  
Radical Intermediate ◽  
Radical Chain ◽  
High Yields

Using heterogeneous photocatalysis, the radical addition of tertiary amines with electron deficient alkenes can be performed in high yields (up to 98%) and high facial diastereoselectivity. The photochemical induced electron transfer process initiates the radical chain reaction and inorganic semiconductors likeTiO2and ZnS were used. According to the proposed mechanism, the reaction takes place at the surface of the semiconductor and the termination step results from an interfacial electron transfer from the conduction band to the oxoallyl radical intermediate. Frequently, semiconductors are used for the mineralisation of organic compounds in wastewater. However, in this case, they are used in organic synthesis. The process can be performed in a convenient way and is particularly interesting from the ecological and economical point of view. No previous functionalization of the tertiary amines is necessary for C − C bond formation. Further on, the amines are used both as reactant and as solvent. The excess is recycled by distillation and the inexpensive sensitiser can be easily removed by filtration. In this way, products of high interest for organic synthesis are obtained by a diastereoselective radical reaction.

Sign in / Sign up

Export Citation Format

Share Document