Chinese Journal of Organic Chemistry ›› 2023, Vol. 43 ›› Issue (9): 3257-3267.DOI: 10.6023/cjoc202302026 Previous Articles     Next Articles

Special Issue: 有机氟化学虚拟合辑

3-(三氟甲基)吡唑类化合物的合成

马虎, 黄丹凤*(), 王克虎, 唐朵朵, 冯杨, 任园园, 王君娇, 胡雨来*()   

  1. 西北师范大学化学化工学院 兰州 730070
  • 收稿日期:2023-02-23 修回日期:2023-05-07 发布日期:2023-05-23
  • 基金资助:
    国家自然科学基金(22061037); 国家自然科学基金(21861033); 上海恩氟佳科技有限公司资助项目

Synthesis of 3-Trifluoromethylpyrazole Derivatives

Hu Ma, Danfeng Huang(), Kehu Wang, Duoduo Tang, Yang Feng, Yuanyuan Reng, Junjiao Wang, Yulai Hu()   

  1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070
  • Received:2023-02-23 Revised:2023-05-07 Published:2023-05-23
  • Contact: E-mail: huangdf@nwnu.edu.cn;huyl@nwnu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(22061037); National Natural Science Foundation of China(21861033); Shanghai Sinofluoro Chemicals Co., Ltd.

The [3+2] cycloaddition reactions of trifluoroacetohydrazonoyl bromides with ynones, alkynoates and aynamides have been developed, and a series of 3-trifluoromethylpyrazole derivatives were obtained in medium to excellent yields. The noble features of this protocol include excellent regioselectivity, good functional group tolerance, mild reaction conditions and simple operation. It provides an efficient and practical method for the synthesis of 3-trifluoromethylpyrazoles.

Key words: trifluoromethyl group, pyrazoles, acetonitrile imines, trifluoroacetohydrazonoyl bromides, [3+2] cycloaddition