title: Studies on the oxidation products from 2,4-diaminotoluene by hydrogen peroxide and their mutagenicities. II.
abstract: 2,4-Diaminotoluene (DAT) was reacted with hydrogen peroxide at room temperature for 2 days, and the resulting red precipitates were separated into 5 fractions on silica gel column chromatography. On the gas chromatographic (GC) study, the first fraction (Fr. 1), which is mutagenic (1425 and 1391 revertants/micrograms in the absence and presence of S9 respectively) in Salmonella typhimurium TA98, contained several peaks. Fr. 1 was further separated into 4 subfractions (Fr. 1-I-Fr. 1-IV) by silica gel column chromatography. The red crystals were separated from Fr. 1-III and the structure of the compound was determined to be 1,8-diamino-2,7-dimethylphenazine from physicochemical and chemical evidence. Further, o-nitro-p-toluidine, p-nitro-o-toluidine, 3,3'-diamino-4,4'-dimethylazobenzene and 3,3'-diamino-4,4'-dimethylazoxybenzene were identified with authentic and synthesized samples by gas chromatography/mass spectrometry. These compounds without nitrotoluidines were mutagenic, and phenazine, azo and azoxy compounds induced 49, 301 and 245 revertants/nmole in Salmonella typhimurium TA98 with 25 microliters S9 per plate, respectively.
authors.affiliation: Kyoto Pharmaceutical University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Watanabe
authors.forename: M
authors.initials: M
authors.lastname: Ono
authors.forename: T
authors.initials: T
authors.lastname: Hirayama
authors.forename: S
authors.initials: S
authors.lastname: Fukui
mesh_terms: D000818:Animals; D001711:Biotransformation; D002849:Chromatography, Gas; D008401:Gas Chromatography-Mass Spectrometry; D006861:Hydrogen Peroxide; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008862:Microsomes, Liver / Q000378:metabolism; D015394:Molecular Structure; D009152:Mutagenicity Tests; D009153:Mutagens; D010084:Oxidation-Reduction; D010655:Phenylenediamines / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D012486:Salmonella typhimurium / Q000187:drug effects
chemical_list: D009153:Mutagens; D010655:Phenylenediamines; D006861:Hydrogen Peroxide; C010914:2,4-diaminotoluene