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2-Acetyl-3-methylquinoxaline 1,4-dioxide

Benzoxadiazole 1-oxide (473) gave 2-acetyl-3-methylquinoxaline 1,4-dioxide (472) (AC2CH2, NaOH, EtOH, 55°C, 90 min, then 20°C, 12 h 54% or AC2CH2 on Si02 gel, 20°C, 7 days 58%), 2-benzoyl-3-methylquinoxaline 1,4-dioxide (474) (BZCH2AC on 3A molecular sieve,... [Pg.63]

BzCH2C(=0)CH2Ph, neat EtjN, 20°C, 24 h 21%) ° 5,6-Difluoro-2,l,3-benzoxadiazole 1-oxide (476) gave 2-acetyl-6,7-difluoro-3-methylquinoxaline 1,4-dioxide (477) (AC2CH2, neat Et3N, 5°C, 1 h, then 20°C, 1 h 72% analogs likewise). ° = ... [Pg.64]

Benzoxadiazole 1-oxide (481) with 3-acetyltetrahydro-2-furanone (2-acetyl-butyrolactone 482) gave 2-(2-hydroxyethyl)-3-methylquinoxaline 1,4-diox-ide (483) (KOH, MeOH-HaO, 20°C, 24 h 50%) but with 2-acetylacetaldehyde dimethyl acetal (484), in the presence of morpholine as base, it gave 2-(2-morpholinovinyl)quinoxaline 1,4-dioxide (485) (PhH, reflux, water separation, 9 h 47%) ... [Pg.65]

Acetyl-3-methylquinoxaline from its 1,4-dioxide (256) (TiCl3, MeOH, H2O, 20°C, 1 h 39% substrate, Et20,20°C, TiCUJ, then Zn dustj, slowly, 1 h ... [Pg.232]

Acetyl-3-methylquinoxaline from its 1,4-dioxide (262) [substrate, Nal, AcMe, 20°C then (F3CC0)20 slowly, extremely rapid reaction 86%] analogs... [Pg.234]

Acetoxymethyl-7-acetyl-2-quinoxalinecarboxamide 1-oxide 2-Acetoxymethyl-3-benzoylquinoxaline 4-oxide 2-Acetoxymethyl-5-methoxy-3-methylquinoxaline 2-Acetoxymethyl-5-methoxy-3-methylquinoxaline 1,4-dioxide 2-Acetoxymethyl-3-methylquinoxaline... [Pg.362]

See other pages where 2-Acetyl-3-methylquinoxaline 1,4-dioxide is mentioned: [Pg.364]    [Pg.364]    [Pg.275]    [Pg.364]    [Pg.64]    [Pg.364]    [Pg.365]    [Pg.275]    [Pg.47]   
See also in sourсe #XX -- [ Pg.63 ]

See also in sourсe #XX -- [ Pg.63 ]



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2- -3-methylquinoxaline 1,4-dioxide

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2-Acetyl-3-methylquinoxaline

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