PROCESS FOR PREPARING PYRAZOLES
    21.
    发明申请

    公开(公告)号:US20170210712A1

    公开(公告)日:2017-07-27

    申请号:US15329104

    申请日:2015-07-30

    Applicant: BASF SE

    Abstract: The present invention relates to a process for preparing a pyrazole compound of formula V, the process including 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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