Greener approach: Ionic liquid [Et<sub>3</sub>NH][HSO<sub>4</sub>]-catalyzed multicomponent synthesis of 4-arylidene-2-phenyl-5(4<i>H</i>)oxazolones under solvent-free condition
作者:Santosh A. Jadhav、Aniket P. Sarkate、Mazahar Farooqui、Devanand B. Shinde
DOI:10.1080/00397911.2017.1340649
日期:2017.9.17
chloride, amino acid, and a variety of aldehydes catalyzed by ILs [Et3NH][HSO4] and catalytic amount of acetic anhydride and sodium acetate. The final products were confirmed by their characterization data such as FTIR, 1H-NMR, 13C-NMR, Mass, high-resolution mass spectra and were compared with its reported method. GRAPHICAL ABSTRACT
摘要 我们开发了简单、更环保、更安全的多组分合成系列 4-亚芳基-2-苯基-5(4H) 恶唑酮 4(ar) 以三乙基硫酸氢铵 [Et3NH][HSO4] 为催化的布朗斯台德酸离子液体和催化量的乙酸酐和乙酸钠,产率极好(90-99%)。该协议提供了经济、环境友好、无溶剂的条件,以及催化剂的回收再利用,并且从苯甲酰氯 1、氨基酸 2 和各种醛 3 开始很容易获得。 环化后苯甲酰氯、氨基酸的缩合,以及由ILs [Et3NH][HSO4]和催化量的乙酸酐和乙酸钠催化的多种醛。最终产物通过其表征数据如 FTIR、1H-NMR、13C-NMR、Mass、高分辨率质谱,并与其报道的方法进行了比较。图形概要