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3-Oxo-3,4-dihydro-2-quinoxalinecarboxylic acid

DUiydroxy-2,3,4,5-tetrahydro-l//-benzodiazepine-2,4-dione (441) gave 2,3-(l//,47/)-quinoxalinedione (443) (xylene, reflux, 4 h 17% after purification) or 3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (444) (2M HCl, reflux, 15 min 58%) both products appear to have come from the intermediate... [Pg.59]

Oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (36, R = OH) gave 3-oxo-3,4-dihydro-2-quinoxalinecarbonyl chloride (36, R = Cl) (neat SOCI2, reflux, 1 h 6,7-dimethoxy -methyl-3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (37, R = OH) gave 6,7-dmieihoxy-4-methyl-3-oxo-3,4-dihydro-2-quinoxalinecarbonyl chloride (37, R = C1) (likewise >91%). ... [Pg.323]

Dimethoxy-3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (61, R = H) gave methyl 6,7-dimethoxy-4-methyl-3-oxo-3,4-dihydro-2-quinoxalinecarboxylate... [Pg.198]

Bromo-4-ethyl-3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid 2-Bromo-3-ethylquinoxaline 6-Bromo-7-fluoro-5-nitro-2,3( 1/7,477)-quinoxalinedione... [Pg.373]

Hydroxy-3-oxo-3,4-dihydro-2-quinoxalinecarbonitrile 4-Hydroxy-3-oxo-3,4-dihydro-2-quinoxalinecarbonitrile 1-oxide 4-Hydroxy-3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid 1 -Hydroxy-3-phenyl-2( l/f)-quinoxalinone... [Pg.412]

See other pages where 3-Oxo-3,4-dihydro-2-quinoxalinecarboxylic acid is mentioned: [Pg.322]    [Pg.383]    [Pg.383]    [Pg.407]    [Pg.427]    [Pg.428]    [Pg.428]    [Pg.322]    [Pg.364]    [Pg.367]    [Pg.383]    [Pg.383]    [Pg.385]    [Pg.385]    [Pg.394]    [Pg.395]    [Pg.398]    [Pg.407]    [Pg.410]    [Pg.411]    [Pg.414]    [Pg.422]    [Pg.422]    [Pg.422]    [Pg.422]    [Pg.428]    [Pg.434]   
See also in sourсe #XX -- [ Pg.59 , Pg.72 ]

See also in sourсe #XX -- [ Pg.59 , Pg.72 ]



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3- -2-quinoxalinecarboxylic

3- -5-oxo-4,5-dihydro

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