Cyanopyridines. Synthesis and Recyclization of Their Quaternary Salts
作者:G. P. Sagitullina、L. V. Glizdinskaya、S. I. Oleinikova、E. G. Atavin、R. S. Sagitullin
DOI:10.1007/s11178-005-0348-y
日期:2005.9
3-Cyanopyridines containing an acetyl, ester, nitro, or cyano group in the 5-position were synthesized via various versions of the Hantzsch reaction. Recyclization of quaternary pyridinium salts by the action of aqueous-alcoholic alkali afforded 2-methylaminopyridine derivatives and 6-methylamino-3-nitro-2,4-diphenylbenzonitrile.
通过不同版本的 Hantzsch 反应,合成了在 5 位含有乙酰基、酯基、硝基或氰基的 3-氰基吡啶。在水-醇碱的作用下,季铵盐吡啶的再环化产生了 2-甲基氨基吡啶衍生物和 6-甲基氨基-3-硝基-2,4-二苯基苯腈。