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2-Methoxy-3-methylquinoxaline

The somewhat analogous substrate, p-methoxy-A-(2-nitroprop-l-enyl)aniline (15), afforded 6-methoxy-3-methylquinoxaline 4-oxide (16) (98% H2SO4 %). ... [Pg.3]

Methoxy-3-methyl-5-quinoxalinamine (149, R = NH2) gave 6-methoxy-3-methylquinoxaline (149, R = H) (98% H2SO4, EtOH, NaN02i slowly,... [Pg.286]

Methoxy-2-methylquinoxaline 1,4-dioxide 2-Methoxy-3-methylquinoxaline 4-oxide 6-Methoxy-3-methylquinoxaline 4-oxide ( )... [Pg.415]

Quinoxalin-2-ones are in tautomeric equilibrium with 2-hydroxy-quinoxalines, but physical measurements indicate that both in solution and in the solid state they exist as cyclic amides rather than as hydroxy compounds. Thus quinoxalin-2-one and its A -methyl derivative show practically identical ultraviolet absorption and are bases of similar strength. In contrast, the ultraviolet spectra of quinoxalin-2-one and its 0-methyl derivative (2-methoxyquinoxaIine) are dissimilar. The methoxy compound is also a significantly stronger base (Table II). Similar relationships also exist between the ultraviolet absorption and ionization properties of 3-methylquinoxalin-2-one and its N- and 0-methyl derivatives. The infrared spectrum of 3- (p-methoxy-benzyl)quinoxalin-2-one (77) in methylene chloride shows bands at 3375 and 1565 cm" which are absent in the spectrum of the deuterated... [Pg.229]

Bromomethyl-2,3-dimethoxy-7-methylquinoxaline (265) underwent a classical Sommelet reaction and incidental hydrolysis of the methoxy groups to give 7-methyl-2,3-dioxo-l,2,3,4-tetrahydro-6-quinoxalinecarbaldehyde (266) (hexamethylenetetramine, CHCI3, 20°C reflux, 30 min solid from evapora-... [Pg.180]

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]

Bromomethyl-6-ethoxy-7-fluoro-3-phenylthioquinoxaline 1,4-dioxide 2-Bromomethyl-7-ethoxy-6-fluoro-3-phenylthioquinoxaline 1,4-dioxide 2-Bromomethyl-5-methoxy-3-methylquinoxaline... [Pg.375]

Chloro-5-methoxy-3-methylquinoxaline 2-Chloro-8-methoxy-3-methylquinoxaline 6-Chloro-5-methoxy-3-oxo-3,4-dihydro-2-quinoxalinecarbonitrile 1-oxide... [Pg.382]

Abe et al. reported that the imidazol [l,2-a]pyridine moiety of the basic framework of a class of the non-peptide bradykinin B2 receptor antagonists (11, Figure 15.14) could be successfully replaced by several heterocyclic bioisosteres. Among those, the l-methyl-2-methoxy-l//-benzimidazole, 2-methylquinoxaline and 2-methylquinoline derivatives showed potent B2 binding affinities against both human and guinea pig B2 receptors (Figure 15.14). [Pg.301]

Nitration of 5-methoxyquinoxaline with potassium nitrate in concentrated sulfuric acid gives the 6,8-dinitro derivative, and the 6-methoxy compound is converted to 5-nitro-6-methoxyquinoxaline with these reagents. Nitration of 6-p-toluenesulfonamidoquinoxaline in acetic acid also gives a 5-nitro derivative. 6-Methylquinoxaline is brominated in the side chain when treated with N-bromosuccinimide in the presence of azobis-isobutyronitrile, and 6-bromomethylquinoxaline is obtained. " ... [Pg.19]

See other pages where 2-Methoxy-3-methylquinoxaline is mentioned: [Pg.413]    [Pg.415]    [Pg.415]    [Pg.286]    [Pg.413]    [Pg.415]    [Pg.382]    [Pg.382]    [Pg.390]    [Pg.410]    [Pg.410]    [Pg.413]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.286]    [Pg.390]    [Pg.410]    [Pg.410]    [Pg.413]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.241]    [Pg.464]    [Pg.31]    [Pg.45]    [Pg.362]   
See also in sourсe #XX -- [ Pg.286 ]

See also in sourсe #XX -- [ Pg.286 ]



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2- Methylquinoxalines

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