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6- Bromo-2 -quinoxalinone

Chloro-l-methyl-2-quinoxalinone (215), which cannot anionize, reacts readUy with iV -methylaniline. 6-Bromo-as-triazine-3,5-dione (216) is largely anionized by dimethylamine but not by thiourea... [Pg.248]

Bromo-A -ferf-butyl-6-(2-chloroacetamido)aniline (25) gave 5-bromo-4-tert-butyl-3,4-dihydro-2(l//)-quinoxalinone (26) (EtPrjN, Nal, MeCN, reflux, 22 h 79%). ... [Pg.5]

Benzenediamine (228) and diethyl dibromomalonate (229) gave ethyl 3-oxo-3,4-dihydro-2-quinoxalinecarboxylate (230) (MeOH, 20°C, 24 h 40%)." The same substrate (228) with ethyl a-bromoisobutyrate gave 3,3-dimethyl-3,4-dihydro-2(17i)-qumoxalinone (231) (Me2NCHO, NEtPr j, 110°C, 7 h 76%) or with methyl 2-bromo-2-phenylacetate gave 3-phenyl-3,4-dihydro-2(l//)-quinoxalinone (232) (KI, K2CO2, AcMe, reflux, 12 h then oily product, MeONa, PhH, reflux, 7 h 89%). ... [Pg.33]

Dunethoxy-3-phenyl-2(l/7)-quinoxalinone gave 2-bromo-5,7-dimethoxy-3-phenylquinoxaline (19) (PBr3, 135°C, 75 min 50%)." ... [Pg.137]

Bromo-7-fluoro-3,4-dihydro-2(177)-quinoxalinone (35) gave 6-bromo-7-fluoro-5-nitro-2,3(177,477)-quinoxalinedione (36) regioselectively (fuming HNO3, F3CCO2H, 20°C, 12 h 85% analogs likewise). ... [Pg.193]

Note These typical examples include both intra- and intermolecular cychza-tions, some of which do not directly involve the 0x0 substiment. 3-(a-Bromophenacyl)-2(l//)-quinoxalinone (102) gave 3-bromo-2-phenylfuro-[2,3-h]quinoxaline (103) (95% H2SO4, 65°C, 4 h 90% analogs likewise) a... [Pg.204]

Bromo-7-fluoro-3,4-dihydro-2(l//)-quinoxalinone (2) gave only 6-bromo-... [Pg.256]

Anilino-2-quinoxalinecarboxamide 3-AniIino-2-quinoxalinecarboxylic acid 3-Azido-7-benzoyl-2(l//)-quinoxalinone 2-Azido-6-bromo-3-methylquinoxaline... [Pg.368]

Bromo-2(l//)-quinoxalinone 6-Bromo-2(l//)-quinoxalinone 4-oxide 6-Bromo-2,3,7,8-tetramethyl-5-nitroquinoxaline... [Pg.376]

Halogenation of 2-quinoxalinone (60) in acetic acid gives the 7-sub-stituted product almost quantitatively bromine at 20° thus yields 95% of 7-bromo-2-quinoxalinone (61).72... [Pg.383]

See other pages where 6- Bromo-2 -quinoxalinone is mentioned: [Pg.305]    [Pg.102]    [Pg.137]    [Pg.140]    [Pg.186]    [Pg.374]    [Pg.375]    [Pg.376]    [Pg.376]    [Pg.376]    [Pg.376]    [Pg.376]    [Pg.102]    [Pg.137]    [Pg.140]    [Pg.186]    [Pg.362]    [Pg.374]    [Pg.375]    [Pg.376]    [Pg.376]    [Pg.376]    [Pg.418]    [Pg.422]    [Pg.422]   
See also in sourсe #XX -- [ Pg.140 ]

See also in sourсe #XX -- [ Pg.140 ]



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Quinoxalinones

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