Nucleophilic Reaction upon Electron-Deficient Pyridone Derivatives. X.One-Pot Synthesis of 3-Nitropyridines by Ring Transformation of 1-Methyl-3,5-dinitro-2-pyridone with Ketones or Aldehydes in the Presence of Ammonia
作者:Yasuo Tohda、Miyuki Eiraku、Takao Nakagawa、Yumi Usami、Masahiro Ariga、Toshihide Kawashima、Keita Tani、Hiroko Watanabe、Yutaka Mori
DOI:10.1246/bcsj.63.2820
日期:1990.10
The reaction of 1-methyl-3,5-dinitro-2-pyridone (1a) with ketones or aldehydes in the presence of ammonia gave alkyl- and/or aryl-substituted 3-nitropyridines (6) in moderate to high yields. Enamines derived from the ketones gave better results than did the ketones themselves; on the other hand, those derived from the aldehydes gave no 6 at all. On the basis of deuterium-labeled experiments, a mechanism comprising competitive ring transformations of 1a is proposed.
在氨存在下,1-甲基-3,5-二硝基-2-吡啶酮(1a)与酮或醛反应,以中等至高产率得到烷基和/或芳基取代的3-硝基吡啶(6)。由酮衍生的烯胺比酮本身得到的结果更好;另一方面,由醛衍生的烯胺完全没有得到6。基于氘标记实验,提出了一个涉及1a竞争性环转换的机理。