title: [Reactions of nascent quinones with methyl beta-alanate in glacial acetic acid and in aqueous solution (author's transl)].
abstract: In order to generate a model for the reaction of proteins with nascent quinones, catechol and 4-methylcatechol were oxidized with silver-I-oxide in glacial acetic acid or with mushroom tyrosinase (EC 1.10.3.1) in phosphate buffer, respectively. The structures identified indicate that not only the amine reacts with the quinone by the well known addition-oxidation-mechanism, but also that solvent molecules may participate in product formation. The main product of the oxidation of catechol in glacial acid is N-(2-carbomethoxyethyl)-phenoxaz-2,3-dione.
mesh_terms: D000085:Acetates; D000409:Alanine / Q000031:analogs & derivatives*; D001487:Basidiomycota / Q000201:enzymology; D002396:Catechols; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D014442:Monophenol Monooxygenase; D010084:Oxidation-Reduction; D013053:Spectrophotometry; D014867:Water; D015091:beta-Alanine / Q000031:analogs & derivatives*
chemical_list: D000085:Acetates; D002396:Catechols; D014867:Water; D015091:beta-Alanine; D014442:Monophenol Monooxygenase; D000409:Alanine
vernacular_title: Reaktionen von naszierenden Chinonen mit beta-Alaninmethylester in Essigsäure und in wässriger Lösung.