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Pyridin-2-yl-

Amino-5-bromophenyl(pyridin-2-yl)methanone ( ABP , deep violet, hR < 5), 2-amino-5-nitrobenzophenone ( ANB , pink, hR 15 — 20), 2-amino-5-chloro-... [Pg.226]

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

C Nuclear Magnetic Resonance Spectra. The sohd-state CNMR spectra of 6,7-dimethyl-2,3-di(pyridin-2-yl)quinoxahne (130) and its salts have been used to complement X-ray information (see above) on fine structure. A study of the spectra of mono- to tetramethylquinoxalines has made possible the analysis of mixtures of such methylated quinoxalines obtained from ambiguous primary syntheses. [Pg.117]

Methyl-2,3-di(pyridin-2-yl)-5-quinoxalinamine (119) gave 6-methyl-2,3-di-(pyridin-2-yl)-5,8-quinoxalinequinone (120) (Mn02, 100% H2SO2, 0°C, 4 h ... [Pg.207]

Methoxyquinoxaline (10, R = H) gave 6-methoxy-5-nitroquinoxaline (10, R = N02) (95% H2SO4, KN03i slowly, 20°C, 2 h 79%) ° a similar procedure was used to make 6-methoxy-3-morpholino-5-nitroquinoxalme (11) (90%) but more vigorous conditions were used to afford 6-meth-oxy-5-nitro-2,3-bis(pyridin-2-yl)quinoxalme (12) (95% H2SO4, KNO3I slowly, 20°C 70°C, 3 h 96%). ... [Pg.257]

Methyl-5-nitro-2,3-bis(pyridin-2-yl)quinoxaline (32, R = N02) gave 6-methyl-... [Pg.262]

Di(pyridin-2-yl)-6-quinoxalinamine (85) gave 6-benzylamino-2,3-di(pyridin-2-yl)quinoxaline (87) via the unisolated benzylideneamino derivative (86) [one-pot reaction substrate (85), PhCHO, NaBH(OAc)3, CICH2CH2CI, 25°C, 5 h 85%]. °... [Pg.273]

Hydrazinoquinoxaline gave 2- [ot-(pyridin-2-yl)benzyhdene]hydrazino qui-noxaline (233) (2-benzoylpyridine, MeOH, trace AcOH, reflux, <12 h ... [Pg.302]

Besides sulfonamides, chiral sulfoximines have also been used in C - N bond formation under microwave irradiation [103]. The only heteroaryl chloride used in the study—namely, 2-chloropyridine—gave the desired M-(pyridin-2-yl)sulfoximine at a yield of 43% (Scheme 101). Interestingly,... [Pg.204]

ABP = 2-amino-5-bromophenyl(pyridin-2-yl)methanone 226,227 Absorbance, determination of 31 Absorption, measurement of 9,17,31 molar coefficient 36, 40 quantitative relationship 35, 36 recording of spectra 30, 31 -bathochromic/hypsochromic shift 31 -comparison to spectra of solutions 31 scanning curves 17,31,32 ACB = 2-amino-5-chlorobenzophenone 227... [Pg.231]

Aminobenzophenones 223,225 2-Amino-5-bromophenyl(pyridin-2-yl)methanone (= ABP) 226, 227 2-Amino-5-chlorobenzophenone (ACB) 226, 227... [Pg.232]

Diiodo-l,2-benzenediamine gave 5,8-diiodo-2-(pyridin-2-yl)quinoxaline (131, R = I) [2-(bromoacetyl)pyridine HBr, Me2SO, 60°C, 1 h 20% aerial or solvent oxidation ] 172 perhaps by a comparable mechanism, 1,2-benzenediamine... [Pg.21]

The mass spectral behavior of several nuclear and extranuclear nitroquinoxalines has been investigated in some detail.290,763 The X-ray analysis of 5-nitro-2,3-bis(pyridin-2-yl)quinoxaline1115 and its bisperchlorate salt1113 have been reported. Reduction to quinoxalinamines is the main transformation of nitroquinoxalines, but they also undergo useful displacement reactions. [Pg.260]

See other pages where Pyridin-2-yl- is mentioned: [Pg.80]    [Pg.40]    [Pg.159]    [Pg.81]    [Pg.21]    [Pg.22]    [Pg.116]    [Pg.260]    [Pg.262]    [Pg.137]    [Pg.139]    [Pg.22]    [Pg.116]   


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