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2-Chloro-3-methylquinoxalines

Chloro-3-methylquinoxaline and 2-cyanomethylpyridine gave 2-[a-cyano-a-(pyridin-2-yl)methyl]-3-methylquinoxaline (56) (K2CO3, MeaNCHO, reflux,... [Pg.104]

Chloroquinoxaline (155) and 2-chloro-3-methylquinoxaline (156) gave 6-chloropyrrolo[l,2-a 4,5-/7 ]diquinoxaline (157) (AcMe, trace HCl, 20°C, 3 days 46%) several analogs likewise. ... [Pg.120]

Chloro-3-methylquinoxaline 4-oxide gave 3-chloro-2-quinoxalinecarbalde-hyde 1-oxide (172) (SeOi, PhH, reflux, h 72%) dioxane may be used as solvent for such oxidations yielding, for example, 3-amino-2-quinoxaline-carbaldehyde ethyl acetate may also be so used. [Pg.124]

Dichloro-2-methyl-3-phenylsulfonylquinoxaline 1,4-dioxide (55, R = S02Ph) gave 2-bromo-6,7-dichloro-3-methylquinoxaline 1,4-dioxide (55, R = Br) (48% HBr, 80°C, 30 min then 20°C, 12 h 31%) 2-methyl-3-phenylsulfonylquinoxaline 1,4-dioxide gave 2-chloro-3-methylquinoxaline 1,4-dioxide (35% HCl, 70°C, 15 min 87% several analogs likewise). ... [Pg.144]

Chloro-3-methylquinoxaline (88, R = Cl) gave 2-dimethylamino-3-methylqui-noxaline (88, R = NMe2) (Me2NH, H2O, reflux, 30 min 88%) or 2-anilino-3-methylquinoxaline (88, R = NHPh) (PI1NH2, KI, K2CO2, PhH, reflux, 10 h %). ... [Pg.150]

Chloro-3-methylquinoxaline gave 2-carboxymethylthio-3-methylqumoxaline (157) (HSCH2CO2H, K2CO3, PhH, reflux, 4h %). ... [Pg.163]

Chloro-3-methylquinoxaline (161, R = C1) gave 2-methyl-3-phenylthioqui-noxaline (161, R = SPh) (PhSH, EtjN, MeOH, reflux, 2h 90%). ... [Pg.163]

Chloro-3-methylquinoxaline gave only 2-chloro-4-methylquinoxaline 4-oxide (241) (m-ClC6H4C03H, CHCI3, 20°C, 6 h 82%). °... [Pg.228]

Chloro-3-methylquinoxaline (166) gave 2-methyl-3-phenylsulfonylquinoxa-line (167) (PhS02Na, Et3N+CH2Ph Cl, MeCN, reflux, 10 h 81% identified with that produced by oxidation of 2-methyl-3-phenylthioquinoxaline see Section 5.2.2) 996 likewise 2-phenylsulfonyl-3-styrylquinoxaline (80%) and... [Pg.164]

Bromo-2-chloro-3-methylquinoxaline 6-Bromo-7-chloro-5-nitro-2,3(l //, 4// )-quinoxalinedione... [Pg.373]

Chloro-l-methyl-2,3(177,4//)-q uinoxalinedionc 6-Chloro-4-methyl-2,3(1/7,4/7)-quinoxalinedione 6-Chloro-7-methyl-2,3(1/7,4/7)-quinoxalinedione 2-Chloro-3-methylquinoxaline 1,4-dioxide 6-Chloro-3-methylquinoxaline 1,4-dioxide 6-Chloro-7-methylquinoxaline 1,4-dioxide 2-Chloro-3-methylquinoxaline 1-oxide 2-Chloro-3-methylquinoxaline 4-oxide... [Pg.384]

Chloro-3-methylquinoxaline (7) undergoes reaction with a / ,7-unsaturated Grignard reagent to give the 2-allylquinoxaline derivative 8, which is obtained as an oil. [Pg.237]

Catalytic hydrogenation of 2-chloro-3-methylquinoxaline using 5% palladium(II) chloride-charcoal catalyst in acetic acid at 60 °C and 2 atmospheres gives racemic 2-methyl-l,2,3,4-tetrahydroquinoxaline in 65% yield. ... [Pg.250]

Alkylquinoxalines have also been prepared by various transformations of preformed quinoxalines. Thus 2-carboxy groups are usually readily decarboxylated and 2-chloro groups removed by catalytic hydrogenation. Illustrative of this approach is the reduction of 2-chloro-3-methylquinoxaline to 2-methylquinoxaline. " ... [Pg.207]

Chloro-3-methylquinoxaline, C-70121 2-Chloro-5-methylquinoxaline, C-70122 2-Chloro-6-methyIquinoxaline, C-70123 2-Chloro-7-methylquinoxaline, C-70124 2-(Chloromethyl)quinoxaline, C-70120... [Pg.613]

See other pages where 2-Chloro-3-methylquinoxalines is mentioned: [Pg.134]    [Pg.160]    [Pg.164]    [Pg.166]    [Pg.373]    [Pg.384]    [Pg.384]    [Pg.384]    [Pg.384]    [Pg.134]    [Pg.160]    [Pg.163]    [Pg.166]    [Pg.384]    [Pg.243]    [Pg.613]    [Pg.613]    [Pg.613]    [Pg.145]   
See also in sourсe #XX -- [ Pg.207 ]



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2- Methylquinoxalines

2-Chloro-3-methylquinoxaline

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

2-Chloro-3-methylquinoxaline 4-oxide

2-Chloro-3-methylquinoxaline 4-oxide oxidation

2-Chloro-5,7-dimethoxy-3-methylquinoxaline

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