Synthetic Studies of the Derivatives of Nitroacetic Acid. II. The Synthesis of Isoxazolecarboxylic Acids from α,β-Unsaturated α-Nitroesters
作者:Shonosuke Zen、Sumio Umezawa
DOI:10.1246/bcsj.36.1146
日期:1963.9
n-butylamine to give 4-substituted isoxazole-3,5-carboxylic butylamides. This is a new synthesis of isoxazole derivatives. 2) The mechanistic features of the above reaction have been explained. 3) The mild alkaline hydrolysis of the above butylamides gave 4-substituted isoxazole-3,5-dicarboxylic acids.
1) α,β-不饱和 α-硝基酯与正丁胺反应生成 4-取代的异恶唑-3,5-羧基丁酰胺。这是异恶唑衍生物的新合成。2) 解释了上述反应的机理特征。3)上述丁基酰胺的温和碱性水解得到4-取代的异恶唑-3,5-二羧酸。