A mild, inexpensive, and operationally simple pyrazole halogenation method utilizing Oxone and sodium halide salts is reported. This work documents 17 examples of alkyl, aryl, allyl, and benzyl substituted 4-chloro and 4-bromopyrazoles, obtained in up to 93% yield. Reactions are performed in water under ambient conditions and generation of organic byproducts is avoided.

中文翻译：

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使用卤化钠盐和Oxone对吡唑进行温和卤化

报道了一种温和，廉价且操作简单的吡唑卤化方法，该方法利用了Oxone和卤化钠盐。这项工作记录了烷基，芳基，烯丙基和苄基取代的4-氯和4-溴吡唑的17个实例，收率高达93％。反应在环境条件下在水中进行，避免了有机副产物的产生。