Wagner-Jauregg,T.; Zirngibl,L., Justus Liebigs Annalen der Chemie, 1963, vol. 668, p. 30 - 50
作者:Wagner-Jauregg,T.、Zirngibl,L.
DOI:——
日期:——
Synthesis of pyrazolones and pyrazoles via Pd-catalyzed aerobic oxidative dehydrogenation
作者:Ye-Fu Zhu、Bo-Le Wei、Jiao-Jiao Wei、Wen-Qiong Wang、Wei-Bin Song、Li-Jiang Xuan
DOI:10.1016/j.tetlet.2019.03.063
日期:2019.4
A palladium-catalyzed oxidative dehydrogenation reaction in the presence of AMS and base to synthesize pyrazolones and pyrazoles was identified. This method can be utilized to a wide range of substrates, operates under mild react conditions and can give high yields. We believe it could be used as an alternative protocol for the classical dehydrogenation reactions.
The bis-addition of arylhydrazines to α,β-unsaturated N-acylbenzotriazoles to form heterocyclic compounds was achieved in refluxing THF by using triethylamine as promoter. The reaction was highly regioselective and various 2-aryl-substituted pyrazolidin-3-ones were obtained in moderate to good yields.