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- W1589873124 abstract "Abstract Efficient hydroxylations were effected without addition of metal compounds. In the dihydroalloxazine system HO· radicals were the hydroxylating species according to the stoichiometry and the distribution of the hydroxyphenylalanine isomers. The OH radicals were generated in one-electron reductions of A R -OOH or H 2 O 2 , in which a dihydroalloxazine or a semiquinone acted as the reducing agent. The yield of hydroxylation varied in dependence on the further oxidation of the hydroxycyclohexadienyl radicals. Quantitative disproportionation occurred in 6N H 2 SO 4 , while an attack by O 2 , H 2 O 2 or A R -OOH predominated in the pH region 0–7. The influence of a HO- consuming aliphatic compound e.g. EDTA was studied. Hydroxylating species are also formed in the attack of an alloxazinium cation by H 2 O 2 , depending on the acidity of the medium." @default.
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- W1589873124 date "1974-01-01" @default.
- W1589873124 modified "2023-09-23" @default.
- W1589873124 title "Activation and transfer of oxygen—IX" @default.
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