Process for producing 2-hydroxyquinoxaline derivatives

Details Process for producing 2-hydroxyquinoxaline derivatives Process for producing 2-hydroxyquinoxaline derivatives

1991-02-21

1992-12-08

Ford, John M.

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

Organic compounds

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

564305, 564442, C07D24144

Patent

active

051699559

ABSTRACT:
A process for producing a 2-hydroxyquinoxaline which may be substituted with one or more substituents selected from the group consisting of halogen, lower alkyl and lower alkoxy, which comprises reacting o-phenylenediamine which may be substituted with one or more substituents selected from the group consisting of halogen, lower alkyl and lower alkoxy with glyoxylic acid in a lower aliphatic alcohol solvent without using a catalyst is disclosed. By the process according to the present invention, the 2-hydroxyquinoxaline derivatives can be obtained at a high purity and a high yield without using any catalyst.

REFERENCES:
patent: 2537871 (1951-01-01), Wolf
patent: 3928350 (1975-12-01), Nottke
patent: 4264600 (1981-04-01), Abdulla
patent: 4450271 (1984-05-01), Su et al.
patent: 4620003 (1986-10-01), Ishikura
patent: 4814444 (1989-03-01), Malz, Jr. et al.
Abstract for JP130977 (Aug. 13, 1982).
Patent Abstracts of Japan, vol. 6, No. 227 (C-134)(1105) Nov. 12, 1982 & JP-A-57 130 977 (Nippon Gosei).

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