Process for the preparation of 2,3-dihalogenoquinoxalines

Details Process for the preparation of 2,3-dihalogenoquinoxalines Process for the preparation of 2,3-dihalogenoquinoxalines

1995-11-21

1998-07-07

Bernhardt, Emily

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544353, 544354, C07D24144

Patent

active

057771197

ABSTRACT:
Quinoxalines are prepared by reaction of oxalic acid with an o-phenylenediamine, halogenation in the presence of a solvent and oxidation to a quinoxaline carboxylic acid derivative.

REFERENCES:
patent: 4309182 (1982-01-01), Koll et al.
Chemical Abstracts (General Chemistry), p. 4, Week E29; "Trichloromethyl quinoxaline cpds . . . ", Bayer AG, Jun. 15, 1982, E13, 41665 E/21=J5 7095-968.
Chemical Abstracts (E: General Chemistry), vol. 90, No. 40, one page; E13:J9 0043736-B, J 9 0043737-B, and J9 0043745-B, Mitsui Toatsu Chem. Inc. (1990).
Chemical Abstracts (General Chemistry), p. 2; "Chlorination of alpha-hydroxy N-heterocyclic cpds . . . ", Bayer AG, Jun. 18, 1982; 37577 E/19=J5 7098-274.
Chemical Abstracts (General Chemistry), p. 2, vol. 87, No. 23; "Chlorination of alpha-hydroxy N-heterocyclic cpds . . . ", Bayer AG, Jun. 4, 1987, J8 7025663-B.
J. March, Advanced Organic Chemistry, Reactions, Mechanisms, and Structure, Mar. 3rd Edition, Chapter 10, pp. 286 -287 and 316.
Condensed Pyrazines by G.W.H. Cheeseman and R.F. Cookson (1979) pp. 94-95, 168.
Heterocyclic Compounds, (Robert C. Elderfield, Editor) vol. 6, p. 480 (1957).
Advanced Organic Chemistry (2nd Ed.) by Jerry Murch (1977) pp. 341-342.

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