Method for producing substituted pyrazoles
    4.
    发明授权
    Method for producing substituted pyrazoles 有权
    制备取代的吡唑的方法

    公开(公告)号:US06229022B1

    公开(公告)日:2001-05-08

    申请号:US09445766

    申请日:1999-12-13

    IPC分类号: C07D23110

    CPC分类号: C07D231/12

    摘要: Pyrazole derivatives are prepared by reacting carbonyl compounds R1—C(O)—CH(R2)—CH2R3 with hydrazine, its hydrate or its salts in 30 to 100% by weight sulfuric acid in the presence of catalytic amounts of iodine or of an iodine compound.

    摘要翻译: 吡唑衍生物通过羰基化合物R1-C(O)-CH(R2)-CH2R3与肼,其水合物或其盐在30至100重量%的硫酸中,在催化量的碘或碘 复合。

    Method for preparing 1-alkyl-pyrazol-5-carboxylic acid esters III
    5.
    发明授权
    Method for preparing 1-alkyl-pyrazol-5-carboxylic acid esters III 有权
    1-烷基 - 吡唑-5-羧酸酯的制备方法

    公开(公告)号:US06444828B1

    公开(公告)日:2002-09-03

    申请号:US09762626

    申请日:2001-02-09

    IPC分类号: C07D23110

    CPC分类号: C07D231/14

    摘要: 1-Alkyl-pyrazole-5-carboxylic esters are obtained with surprisingly low proportions of 1-alkyl-pyrazole-3-carboxylic esters if a 2,4-diketo ester and/or an enolate thereof is reacted with an alkylhydrazine and/or a corresponding alkylhydrazinium salt, if appropriate, in the presence of a solvent and/or of water, in such a manner that during at least about 90% of the reaction free alkylhydrazine is present.

    摘要翻译: 如果2,4-二酮酯和/或其烯醇化物与烷基肼和/或烷基 - 吡唑-3-羧酸酯反应,则以非常低比例的1-烷基 - 吡唑-3-羧酸酯得到1-烷基 - 吡唑-5-羧酸酯 如果合适的话,在溶剂和/或水的存在下,使得在至少约90%的反应游离的烷基肼存在的情况下,相应的烷基肼鎓盐。

    Process for the preparation of pyrazoles
    6.
    发明授权
    Process for the preparation of pyrazoles 失效
    制备吡唑的方法

    公开(公告)号:US06407259B1

    公开(公告)日:2002-06-18

    申请号:US09900097

    申请日:2001-07-06

    IPC分类号: C07D23110

    摘要: A “one-pot” process is described herein for the production of pyrazole compounds of general formula (II) comprising the steps of reacting a compound of general formula (III) with an acylating agent in the presence of a base and an optional activating agent followed by the addition of a hydrazine compound in situ.

    摘要翻译: 本文描述了用于制备通式(II)的吡唑化合物的“一锅”方法,包括以下步骤:在碱和任选的活化剂存在下使通式(III)的化合物与酰化剂反应 然后在原位加入肼化合物。