Hydrogen-atom transfer reaction from triplet 2-naphthylammonium ion to ground-state aromatic ketones

1983 ◽  
Vol 101 (6) ◽  
pp. 598-602 ◽  
Author(s):  
Haruo Shizuka ◽  
Masaru Fukushima
Keyword(s):  
Hydrogen Atom ◽  
Ground State ◽  
Transfer Reaction ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Aromatic Ketones

Sulfamides Direct Radical-Mediated Chlorination of Aliphatic C–H Bonds

2019 ◽  
Author(s):  
Melanie Short ◽  
Mina Shehata ◽  
Matthew Sanders ◽  
Jennifer Roizen
Keyword(s):  
Hydrogen Atom ◽  
Transfer Reaction ◽  
Hydrogen Atom Transfer ◽  
Chain Propagation ◽  
Propagation Mechanism ◽  
Atom Transfer ◽  
Radical Chain ◽  
Radical Intermediates ◽  
Transfer Processes ◽  
Unusual Position

Sulfamides guide intermolecular chlorine transfer to gamma-C(sp<sup>3</sup>) centers. This unusual position-selectivity arises because accessed sulfamidyl radical intermediates engage in otherwise rare 1,6-hydrogen-atom transfer processes. The disclosed chlorine-transfer reaction relies on a light-initiated radical chain-propagation mechanism to oxidize C(sp<sup>3</sup>)-H bonds.

Sulfamides Direct Radical-Mediated Chlorination of Aliphatic C–H Bonds

2019 ◽  
Author(s):  
Melanie Short ◽  
Mina Shehata ◽  
Matthew Sanders ◽  
Jennifer Roizen
Keyword(s):  
Hydrogen Atom ◽  
Transfer Reaction ◽  
Hydrogen Atom Transfer ◽  
Chain Propagation ◽  
Propagation Mechanism ◽  
Atom Transfer ◽  
Radical Chain ◽  
Radical Intermediates ◽  
Transfer Processes ◽  
Unusual Position

Sulfamides guide intermolecular chlorine transfer to gamma-C(sp<sup>3</sup>) centers. This unusual position-selectivity arises because accessed sulfamidyl radical intermediates engage in otherwise rare 1,6-hydrogen-atom transfer processes. The disclosed chlorine-transfer reaction relies on a light-initiated radical chain-propagation mechanism to oxidize C(sp<sup>3</sup>)-H bonds.

Intramolecular 1,5-hydrogen atom transfer reaction promoted by phosphoramidyl and carbamoyl radicals: synthesis of 2-amino-C-glycosides

2007 ◽  
Vol 48 (36) ◽  
pp. 6384-6388 ◽  
Author(s):  
Cosme G. Francisco ◽  
Antonio J. Herrera ◽  
Ángeles Martín ◽  
Inés Pérez-Martín ◽  
Ernesto Suárez
Keyword(s):  
Hydrogen Atom ◽  
Transfer Reaction ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer

scholarly journals Trends in Ground-State Entropies for Transition Metal Based Hydrogen Atom Transfer Reactions

2009 ◽  
Vol 131 (12) ◽  
pp. 4335-4345 ◽  
Author(s):  
Elizabeth A. Mader ◽  
Virginia W. Manner ◽  
Todd F. Markle ◽  
Adam Wu ◽  
James A. Franz ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Transition Metal ◽  
Ground State ◽  
Hydrogen Atom Transfer ◽  
Transfer Reactions ◽  
Atom Transfer ◽  
Atom Transfer Reactions

scholarly journals Efficiency and Selectivity Aspects in the C–H Functionalization of Aliphatic Oxygen Heterocycles by Photocatalytic Hydrogen Atom Transfer

Synlett ◽  
2019 ◽  
Vol 30 (07) ◽  
pp. 803-808 ◽  
Author(s):  
Carlotta Raviola ◽  
Davide Ravelli
Keyword(s):  
Hydrogen Atom ◽  
Uv Light ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Vinyl Sulfone ◽  
Cyclic Carbonates ◽  
Aromatic Ketones ◽  
Oxygen Heterocycles ◽  
Selectivity Studies ◽  
Phenyl Vinyl

The C–H to C–C conversion in aliphatic oxygen heterocycles (dioxolanes, 1,3-dioxane, or cyclic carbonates) by photocatalytic hydrogen atom transfer and subsequent trapping of the resulting radical with phenyl vinyl sulfone was investigated. The performance of three different photocatalysts, namely tetrabutylammonium decatungstate and the aromatic ketones thioxanthone and 9-fluorenone, was compared. The UV-light-absorbing decatungstate anion is more efficient and permits the use of a smaller excess of hydrogen donor than the aromatic ketones, although the ketones could be excited by visible light. Further intramolecular selectivity studies revealed that aromatic ketones afforded a higher proportion of functionalization at the acetalic versus the ethereal positions than did the decatungstate anion.

Excited-State Hydrogen Atom Transfer Reaction in Solvated 7-Hydroxy-4-methylcoumarin

2013 ◽  
Vol 117 (49) ◽  
pp. 15386-15394 ◽  
Author(s):  
Nuwan De Silva ◽  
Noriyuki Minezawa ◽  
Mark S. Gordon
Keyword(s):  
Excited State ◽  
Hydrogen Atom ◽  
Transfer Reaction ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer
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