scholarly journals Competition Between C α ‐S and C α ‐C β Bond Cleavage in β‐Hydroxysulfoxides Cation Radicals Generated by Photoinduced Electron Transfer

2021 ◽  
Author(s):  
Andrea Lapi ◽  
Claudio D’Alfonso ◽  
Tiziana Del Giacco ◽  
Osvaldo Lanzalunga
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Bond Cleavage ◽  
Cation Radicals

scholarly journals Photoinduced electron-transfer chemistry of the bielectrophoric N-phthaloyl derivatives of the amino acids tyrosine, histidine and tryptophan

2011 ◽  
Vol 7 ◽  
pp. 518-524 ◽  
Author(s):  
Axel G Griesbeck ◽  
Jörg Neudörfl ◽  
Alan de Kiff
Keyword(s):  
Amino Acids ◽  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Bond Cleavage ◽  
Derivatives Of

The photochemistry of phthalimide derivatives of the electron-rich amino acids tyrosine, histidine and tryptophan 8–10 was studied with respect to photoinduced electron-transfer (PET) induced decarboxylation and Norrish II bond cleavage. Whereas exclusive photodecarboxylation of the tyrosine substrate 8 was observed, the histidine compound 9 resulted in a mixture of histamine and preferential Norrish cleavage. The tryptophan derivative 10 is photochemically inert and shows preferential decarboxylation only when induced by intermolecular PET.

Photoinduced electron transfer C—C bond cleavage reactions; oxidations and isomerizations

1984 ◽  
Vol 62 (3) ◽  
pp. 424-436 ◽  
Author(s):  
L. W. Reichel ◽  
G. W. Griffin ◽  
A. J. Muller ◽  
P. K. Das ◽  
Seyhan N. Ege
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Bond Cleavage ◽  
Radical Cations ◽  
Laser Flash ◽  
Time Resolved ◽  
Fragmentation Reactions ◽  
Oxidative Products

We have shown that radical cations generated by photoinduced electron transfer (ET) in 1,2-diarylethanes, aryl pinacols, and their derivatives undergo fragmentation reactions. In the presence of oxygen oxidative products are obtained. Time-resolved laser flash photolysis and other ancillary techniques have permitted us to define the mechanisms of certain oxidative processes observed.

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