高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (2): 20240302.doi: 10.7503/cjcu20240302

• 有机化学 • 上一篇    下一篇

二氟甲基溴代腙与乙烯基砜的[3+2]环加成反应合成3-二氟甲基吡唑

刘小康, 周玉秀, 李晓勇, 罗文静, 王克虎, 王君姣, 黄丹凤, 胡雨来()   

  1. 西北师范大学化学化工学院,兰州 730070
  • 收稿日期:2024-06-24 出版日期:2025-02-10 发布日期:2024-11-02
  • 通讯作者: 胡雨来 E-mail:huyl@nwnu.edu.cn
  • 基金资助:
    国家自然科学基金(22061037)

Synthesis of Difluoromethyl Pyrazoles by [3+2] Cycloaddition Reaction of Difluoroacetohydrazonoyl Bromides with Vinyl Sulfonefones

LIU Xiaokang, ZHOU Yuxiu, LI Xiaoyong, LUO Wenjing, WANG Kehu, WANG Junjiao, HUANG Danfeng, HU Yulai()   

  1. College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China
  • Received:2024-06-24 Online:2025-02-10 Published:2024-11-02
  • Contact: HU Yulai E-mail:huyl@nwnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22061037)

摘要:

通过二氟甲基溴代腙与乙烯基砜的[3+2]环加成反应, 合成了一系列3-二氟甲基吡唑化合物. 该方法具有区域选择性高、 反应条件温和及操作简单等优点, 为3-二氟甲基吡唑化合物的合成提供了新方法. 同时, 进一步拓展了二氟甲基溴代腙作为二氟甲基合成砌块在合成二氟甲基氮杂环化合物中的应用.

关键词: 二氟甲基吡唑, 二氟甲基溴代腙, 乙烯基砜, [3+2]环加成

Abstract:

A series of 3-difluoromethyl pyrazole compounds was synthesized via a [3+2] cycloaddition reaction of difluoroacetohydrazonoyl bromides with vinyl sulfones. The method has the advantages of high regioselectivity, mild reaction conditions and simple operation, providing a new method for the synthesis of 3-difluoromethyl pyrazole compounds. Meanwhile, it further extends the application of difluoroacetohydrazonoyl bromides as difluoromethyl building blocks in synthesis of difluoromethyl N-heterocycle compounds.

Key words: Difluoromethyl pyrazoles, Difluoroacetohydrazonoyl bromides, Vinyl sulfones, [3+2] Cycloaddition

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