Metal-Free Oxidation of Urazole and 1,4-Dihydropyridine Derivatives Under Mild and Heterogeneous Conditions by Nitro Urea, Derived from Urea Nitrate, and Silica Sulfuric Acid
Thioacetamide as an Ammonium Source for Multicomponent Synthesis of Pyridines from Aldehydes and Electron-Deficient Enamines or Alkynes
作者:Jie-Ping Wan、Youyi Zhou、Kezhi Jiang、Hongyan Ye
DOI:10.1055/s-0034-1378635
日期:——
for the synthesis of pyridines. In the reactions, thioacetamide is used as a cheap and efficient ammonium source in a multicomponent reaction with aldehydes and electron-deficient enamines or alkynes to give 3,4,5-trisubstituted pyridines in moderate to good yields and with a high product diversity. A generally applicable multicomponent method has been established for the synthesis of pyridines. In the