申请人:Bayer Aktiengesellschaft
公开号:US04423225A1
公开(公告)日:1983-12-27
Process for the preparation of pyrazole by heating a pyrazoline derivative of the general formula ##STR1## in which R represents an optionally substituted phenyl radical, or an alkyl or halogenoalkyl radical, without the addition of an acid or base, at a temperature between 100.degree. and 200.degree. C. under a pressure between 1 mbar and 10 bars, optionally in the presence of a diluent.
通过加热一种通式为##STR1##的吡唑啉衍生物,其中R代表可选取代的苯基、烷基或卤代烷基,在100℃至200℃的温度下,在1mbar至10bar的压力下,无需加入酸或碱,可选择在稀释剂的存在下,制备吡唑。