One step synthesis of 3-cyano-4-(5-nitrobenzothienyl)pyridines and 3-Cyano-4-(5-nitrobenzothienyl)pyridin-2-ones for biological evaluation
作者:S. M. A. D. Zayed、A. Attia
DOI:10.1002/jhet.5570200128
日期:1983.1
A new one-vessel reaction has been developed for the synthesis of substituted aminocyanopyridines 2 and cyanopyridin-2-ones 3. Compounds 2a-c and 3a-c were readily obtained by heating molar amounts of 5-nitro-benzothiophene-2-carboxaldehyde 1, the appropriate acetyl derivative and the active methylene compound (malononitrile or ethyl cyanoacetate) in presence of ammonium acetate. The new method had
已经开发了用于合成取代的氨基氰基吡啶2和氰基吡啶-2-酮3的新的单容器反应。化合物2a-c和3a-c可以通过加热摩尔量的5-硝基-苯并噻吩-2-甲醛1容易地获得。,适当的乙酰基衍生物和活性亚甲基化合物(丙二腈或氰基乙酸乙酯)在乙酸铵存在下。该新方法具有快速,经济和通用的优点。已经提出了一种可能的反应机理。