Process for producing 2-hydroxyquinoxaline derivatives
    3.
    发明授权
    Process for producing 2-hydroxyquinoxaline derivatives 失效
    生产2-羟基喹啉衍生物的方法

    公开(公告)号:US5169955A

    公开(公告)日:1992-12-08

    申请号:US658756

    申请日:1991-02-21

    IPC分类号: C07D241/44

    CPC分类号: C07D241/44

    摘要: 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.