Efficient Synthetic Method for β-Enamino Esters Catalyzed by Yb(OTf)3 under Solvent-Free Conditions
作者:Ravi Varala、Sreelatha Nuvula、Srinivas R. Adapa
DOI:10.1071/ch06239
日期:——
esters have been synthesized in moderate to excellent yields by reacting 1,3-dicarbonyl compounds with amines in the presence of catalytic amounts of Yb(OTf)3 (2 mol%). The reaction proceeds smoothly at ambient temperature undersolvent-freeconditions. The catalyst can be recovered and reused.
A General and Efficient Method for the Preparation of β-Enamino Ketones and Esters Catalyzed by Indium Tribromide
作者:Zhan-Hui Zhang、Liang Yin、Yong-Mei Wang
DOI:10.1002/adsc.200505268
日期:2006.1
A variety of β-enaminoketones and esters have been synthesized in high to exellent yields by reacting β-dicarbonyl compounds with amines in the presence of a catalytic amount of indiumtribromide. The reaction proceeds smoothly at room temperature in a short reaction time under solvent-free conditions.
A general and efficient method for synthesis of enaminones and enamino esters catalyzed by NbCl5 under solvent-free conditions
作者:Yu-Heng Liu、Ping Wang、Gui-Tian Cheng
DOI:10.1007/s00706-012-0783-8
日期:2013.2
synthesis of β-enaminones and β-enamino esters by reacting 1,3-dicarbonyl compounds with amines in the presence of catalytic amounts of niobium pentachloride. The reaction proceeds smoothly at room temperature under solvent-free conditions and leads to chemo- and regioselective formation of enamine derivatives in high to excellent yields. Graphical Abstract
Phosphotungstic Acid Catalysed Synthesis of β-Enamino Compounds under Solvent-Free Conditions
作者:Geng-Chen Li
DOI:10.3184/030823407x273488
日期:2007.12
developed for the synthesis of β-enaminones and β-enamino esters by reacting 1,3-dicarbonyl compounds with amines in the presence of catalytic amounts of phosphotungstic acid (H3PW12O40, 1 mol%). The reaction proceeds smoothly at room temperature under solvent-free conditions and gives the corresponding β-enamino compounds in high to excellent yields.