Thermal-Induced Dimerization Cyclization of Ethyl N-(Styrylcarbamoyl)acetates: Formation of 4-Hydroxy-2(1<i>H</i>)-pyridone-3- carboxamide Derivatives
作者:Sheng-Yin Zhao、Bao-Shuo Liu、Jing Huang、Shao-Hua Cheng、Yun-xia Deng、Zhi-Yu Shao
DOI:10.1080/00397911.2013.878360
日期:2014.7.18
Abstract Thermal-induced dimerization cyclization of ethyl N-(styrylcarbamoyl)acetate derivatives has been investigated, leading to 4-hydroxy-2(1H)-pyridone-3-carboxamide derivatives with good yields in diphenyl ether on 200–210 °C. Ethyl N-(styrylcarbamoyl)acetate derivatives readily provided the intermolecular cyclization products 4-hydroxy-2(1H)-pyridone-3-carboxylates on reflux in xylene. In addition
摘要 已经研究了 N-(苯乙烯基氨基甲酰基)乙酸乙酯衍生物的热诱导二聚环化,导致 4-羟基-2(1H)-吡啶酮-3-甲酰胺衍生物在二苯醚中在 200-210 °C 下具有良好的产率。N-(苯乙烯基氨基甲酰基)乙酸乙酯衍生物在二甲苯中回流时容易提供分子间环化产物4-羟基-2(1H)-吡啶酮-3-羧酸酯。此外,还制备了几种相关的 3-acetyl-4-hydroxy-5-phenylpyridin-2(1H)-ones。它提供了 4-羟基-2(1H)-吡啶酮-3-甲酰胺衍生物的有效制备方法。图形概要