Copper-Promoted Coupling of Propiophenones and Arylhydrazines for the Synthesis of 1,3-Diarylpyrazoles
作者:Ha V. Le、Tung T. Nguyen、Thuyet L. D. Pham、Tien M. Nguyen、Khuong A. Tran、Ha V. Dang、Nam T. S. Phan
DOI:10.1055/s-0039-1690835
日期:2020.5
copper-promoted coupling of propiophenones and arylhydrazines. The reactions afforded substituted pyrazoles in the presence of TEMPO oxidant, acetic acid additive, and DMF solvent. A number of functionalities were compatible with reaction conditions, including halogens, methoxy, trifluoromethyl, and nitro groups. An indazole could be obtained if an electron-poor propiophenone was used.
从商业底物和/或简单转化合成 1,3-二芳基吡唑仍然被低估。在本报告中,我们开发了一种铜促进苯丙酮和芳基肼偶联的方法。在 TEMPO 氧化剂、乙酸添加剂和 DMF 溶剂存在下,反应得到取代的吡唑。许多官能团与反应条件兼容,包括卤素、甲氧基、三氟甲基和硝基。如果使用贫电子苯丙酮,可以获得吲唑。