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- W2008571901 abstract "Oxygenation of a tryptophan residue analog by ascorbate in the presence of catalytic amounts of iron(II) and ethylenediaminetetraacetic acid (EDTA) has been studied. Under physiological conditions, reaction of the tryptophan derivative (N-t-butoxycarbonyl-l-tryptophan) with Fe(II)-EDTA and ascorbate resulted mainly in the oxygenation of the indole moiety of the substrate. In this reaction, cis and trans diastereoisomeric alcohols 3a-hydroxy-1-t-butoxycarbonyl-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indoles have been successfully identified in the metal-catalyzed free radical oxidation of indole compounds. Hydroxylation at C-5 and C-6 and a ring opening reaction between C-2 and C-3 have also been confirmed. The reaction of Fe(II)-EDTA/ascorbate with the tryptophan derivative was apparently nonselective with regard to position and was significantly suppressed by the hydroxyl radical scavengers (mannitol and dimethylsulfoxide), suggesting the participation of the hydroxyl radical as the actual oxidizing species." @default.
- W2008571901 created "2016-06-24" @default.
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- W2008571901 date "1990-05-01" @default.
- W2008571901 modified "2023-09-27" @default.
- W2008571901 title "Formation of diastereoisomeric 3a-hydroxypyrroloindoles from a tryptophan residue analog mediated by iron(II)-EDTA and l-ascorbate" @default.
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- W2008571901 doi "https://doi.org/10.1016/0003-9861(90)90456-9" @default.
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