Process for producing pyrazine compounds
    1.
    发明授权
    Process for producing pyrazine compounds 失效
    吡嗪化合物的制备方法

    公开(公告)号:US5693806A

    公开(公告)日:1997-12-02

    申请号:US681475

    申请日:1996-07-23

    摘要: A process for producing a pyrazine compound of the general formula (3): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, which comprises catalytically reacting in a gaseous phase a diamine compound of the general formula: ##STR2## with a diol compound of the general formula: ##STR3## in the presence of a catalyst containing hydrogen-treated silver or a catalyst containing silver and at least one element selected from the group consisting of alkali metals, alkaline earth metals, zinc and lanthanoid elements.

    摘要翻译: 制备通式(3)的吡嗪化合物的方法:其中R 1,R 2,R 3和R 4表示氢原子或低级烷基,其包括在气相中催化反应二胺化合物 具有以下通式的化合物:具有下式的二醇化合物:(2)在含有氢处理的银或含有银的催化剂的催化剂存在下,和选自以下的至少一种元素: 由碱金属,碱土金属,锌和镧系元素组成的组。