PROCESS FOR PREPARING PYRAZOLES
    16.
    发明申请

    公开(公告)号:US20190194141A1

    公开(公告)日:2019-06-27

    申请号:US16292773

    申请日:2019-03-05

    Applicant: BASF SE

    Abstract: The present invention relates to a process for preparing a pyrazole compound of formula V, which comprises cyclizing a hydrazone substituted α,β-unsaturated carbonyl compound of formula IV by reacting it with a suitable reagent, e.g. a reducing agent, an organometallic reagent or a nucleophilic reagent. The compounds of formula V are versatile reaction tools for the preparation of pyrazole derived fine chemicals. The present invention also relates to pyrazole compounds of formulae Va, Vb, Vc, and VI.

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