PROCESS FOR THE PREPARATION OF 4-ALKOXY-3-HYDROXYPICOLINIC ACIDS
    26.
    发明申请
    PROCESS FOR THE PREPARATION OF 4-ALKOXY-3-HYDROXYPICOLINIC ACIDS 有权
    制备4-烷氧基-3-羟基吡啶羧酸的方法

    公开(公告)号:US20170044105A1

    公开(公告)日:2017-02-16

    申请号:US15339190

    申请日:2016-10-31

    IPC分类号: C07D213/803

    摘要: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.

    摘要翻译: 4,6-二溴-3-羟基吡啶腈可以从选自氰基胺化,胺盐形成和溴化重排的一系列化学步骤中由糠醛制备。 4-烷氧基-3-羟基吡啶甲酸可以从选自溴取代,腈水解和卤素还原的一系列化学步骤中方便地从4,6-二溴-3-羟基吡啶腈制备。