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DPPH-initiated oxygenation of 3-hydroxyflavone to O-benzoylsalicylic acid |
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| Authors: | József Pap József Kaizer and Gábor Speier |
| Institution: | (1) Department of Organic Chemistry, University of Veszprém, 8201 Veszprém, Hungary;(2) Research Group for Petrochemistry, Hungarian Academy of Sciences, 8201 Veszprém, Hungary;(3) I: Department of Organic Chemistry, University of Veszprém; II: Research Group for Petrochemistry, Hungarian Academy of Sciences;, 8201 Veszprém, Hungary |
| Abstract: | Summary The oxidation of 3-hydroxyflavone (flaH) to O-benzoylsalicylic acid (O-bs) initiated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) has been investigated in acetonitrile at ambient temperature. The kinetics was followed by monitoring the disappearance of DPPH spectrophotometrically at 520 nm and the rate constants were determined according to the rate law -dDPPH]/dt = k DPPH]Substrate]. The mean value of the rate constant k at 295 K is 1.21 ± 0.03 dm3 mol-1 s-1. |
| Keywords: | Quercetinase Flavonol oxygenation DPPH Dioxygenase model |
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