Monatshefte fur Chemie p. 127 - 130 (1989)
Update date:2022-07-29
Topics:
Kepez, Mustafa
The primary oxidation products of 2,3-dimethylquinoxaline with selenium dioxide are 3-methylquinoxaline-2-carbaldehyde, 1,3-dihydro-1,3-dihydroxyfuro<3,4-b>quinoxaline and quinoxaline-2-carboxylic acid. 3-Methylquinoxaline-2-carboxylic acid can be obtained in a second oxidation step only. 2,4-Dimethylquinazoline is dehydrogenated by selenium dioxide to the heterocyclic stilbene derivative 8.Confirmation of structure of 8 is given by NMR spectroscopy. - Keywords: Oxidation of methyl groups; SeO2; Quinoxaline; Quinazoline
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