Reactivity of adrenaline toward alkoxyl radicals and carbonyl triplet states.
The reactivities of adrenaline toward hydrogen abstraction by the tert-butoxyl radical and the excited triplet state of benzophenone have been examined in solution using laser flash photolysis techniques. The rate constants obtained in acetonitrile-rich solvents are 13 and 1.5 x 10(8) M(-1) s(-1) for benzophenone triplet and the tert-butoxyl radical, respectively. Adrenaline is a better hydrogen donor than phenol, but not as efficient as alpha-tocopherol.
Cosa
Gonzalo
G
Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 2K6, Canada. gonzalo.cosa@mcgill.ca
Scaiano
J C
JC
D000438:Alcohols / Q000737:chemistry*; D001577:Benzophenones / Q000737:chemistry; D016227:Benzoquinones / Q000737:chemistry; D004837:Epinephrine / Q000737:chemistry*; D005240:Feasibility Studies; D016166:Free Radical Scavengers / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry
D000438:Alcohols; D001577:Benzophenones; D016227:Benzoquinones; D016166:Free Radical Scavengers; D016877:Oxidants; C059688:alkoxyl radical; C025232:semiquinone radicals; C047723:benzophenone; D004837:Epinephrine