Experimental and Theoretical Studies on the Tautomerism in 2-Aminopyridines and 2(1H)-Pyridinones: Synthesis of 2-Amino-4-aryl-3-cyano-6-(3,4-dimethoxyphenyl)pyridines and 4-Aryl-3-cyano-6-(3,4-dimethoxyphenyl)-2(1H)-pyridinones
作者:Abolghasem Davoodnia、Paria Attar、Ali Morsali、Hossein Eshghi、Niloofar Tavakoli-Hoseini、Shahriar Khadem
DOI:10.5012/bkcs.2011.32.6.1873
日期:2011.6.20
Under solvent-free conditions and in one-pot, a series of 2-amino-4-aryl-3-cyano-6-(3,4-dimethoxyphenyl)pyridines and 4-aryl-3-cyano-6-(3,4-dimethoxyphenyl)-2(1H)-pyridinones were prepared using 3,4dimethoxyacetophenone, an aldehyde, malononitrile (or ethyl cyanoacetate), and ammonium acetate in the presence of 3-methyl-1-(4-sulfonylbutyl)imidazolium hydrogen sulfate [HO3S(CH2)4MIM][HSO4] (a Bronsted
在无溶剂条件下,在一锅中,一系列 2-amino-4-aryl-3-cyano-6-(3,4-dimethoxyphenyl)pyridines 和 4-aryl-3-cyano-6-(3,在 3-甲基-1-(4-磺酰基丁基)咪唑硫酸氢盐存在下,使用 3,4-二甲氧基苯乙酮、醛、丙二腈(或氰基乙酸乙酯)和乙酸铵制备 4-二甲氧基苯基)-2(1H)-吡啶酮。 HO3S(CH2)4MIM][HSO4](一种布朗斯台德酸性离子液体)在极短的反应时间内作为催化剂。形成更稳定互变异构体的偏好与在 B3LYP 混合密度泛函水平上使用 Gaussian 03 程序的理论计算一致。