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3-Phenyl-3,4-dihydro-2-quinoxalinecarboxamide

Benzenediamine (199) and C-(2-chloro-2-phenylacetyl)formamide (200) gave 3-phenyl-3,4-dihydro-2-quinoxalinecarboxamide (201), formulated as its 1,4-dihydro tautomer (EtOH, reflux, 6 h 56%) in contrast, the same substrate (199) with methyl C-(2-chloro-2-phenylacetyl)formate cyanohydrin (202) gave methyl 3-phenyl-2-quinoxalinecarboxylate (203), presumably by aerial oxidation of a dihydro precursor (MeCN, reflux, 12 h 7%). ... [Pg.29]

Benzenediamine (218) and the hydrochloride of ethyl 2-[A-cyclohexyl-(ethoxyformimidoyl)]glyoxalate [Et02CCOC(OEt)=N(CeHn)] (prepared in situ) gave A-cyclohexyl-3-oxo-3,4-dihydro-2-quinoxalinecarboxamide (222) (PhH-EtOH-CH2Cl, 40°C, 2 h 81% clearly needing an hydrolytic step). o-Anilinoaniline gave ethyl 3-oxo-4-phenyl-3,4-dihydro-2-quinoxalinecarboxy-... [Pg.32]

Ethyl 3-oxo-4-phenyl-3,4-dihydro-2-qumoxalinecarboxylate (73, R = OEt) gave Af-methyl-3-oxo-4-phenyl-3,4-dihydro-2-quinoxalinecarboxamide (73, R =... [Pg.330]

See other pages where 3-Phenyl-3,4-dihydro-2-quinoxalinecarboxamide is mentioned: [Pg.83]    [Pg.32]    [Pg.83]   
See also in sourсe #XX -- [ Pg.29 ]

See also in sourсe #XX -- [ Pg.29 ]



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3- Phenyl-2-quinoxalinecarboxamide

5-Phenyl-3- 2,3-dihydro

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