5-cyano-4,5-dihydro-3,4-dicarboxypyrazole derivatives
    5.
    发明授权
    5-cyano-4,5-dihydro-3,4-dicarboxypyrazole derivatives 失效
    5-氰基-4,5-二氢-3,4-二羧基吡唑衍生物

    公开(公告)号:US4892956A

    公开(公告)日:1990-01-09

    申请号:US267905

    申请日:1988-11-07

    CPC classification number: C07D231/06

    Abstract: The present invention provides 5-cyano-4,5-dihydro-3,4-dicarboxypyrazoles and a process for preparing such compounds which comprises reacting a dialkyl fumarate with diazoacetonitrile.

    Abstract translation: 本发明提供5-氰基-4,5-二氢-3,4-二羧基吡唑及其制备方法,该方法包括使富马酸二烷基酯与重氮乙腈反应。

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