Process for the selective reduction of 2-hydroxyquinoxaline-4-ox

Details Process for the selective reduction of 2-hydroxyquinoxaline-4-ox Process for the selective reduction of 2-hydroxyquinoxaline-4-ox

1987-06-19

1989-03-21

Berch, Mark L.

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

Organic compounds

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

502223, 564200, C07D24144, B01J 2745, C07B 352

Patent

active

048144444

ABSTRACT:
Certain 2-quinoxalinol-4-oxides are selectively reduced to form 2-quinoxalinols employing hydrogen as a reducing agent by reacting such 2-quinoxalinol-4-oxides with a catalyst selected from the group consisting of sulfided platinum, sulfided palladium, sulfided rhodium and sulfided ruthenium.

REFERENCES:
patent: 3350450 (1967-10-01), Dovell et al.
patent: 4620003 (1986-10-01), Ishikura
patent: 4636562 (1987-01-01), Davis
Japan Abstract for JP 158184 (8/19/85).
Derwent Abstract #85-240373/39 for JP 158184 (8/19/85).
Dovell et al., J. Am. Chem. Soc. 87 p. 2767 (1965).
"Engelhard Catalysts and Precious Metal Chemicals Catalog", pp. 211 and 215 (1985).
Sakata et al, "The Facile One Pot Synthesis of 6-Substituted 2(1H)-Quinoxalinones", Heterocycles, vol. 23, No. 1 (1985).
Elina et al, "N-Oxides of the Quinoxaline Series", Zhurnal Obshchei Khimii, vol. 33, No. 5, pp. 1544-1551.

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