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.
Reported herein is the first catalytic oxidative [4+2] cycloaddition of 2-aminophenols with cyclic enamines. This biomimetic catalytic oxidative strategy expediently accommodates the very labile structurally unbiased ortho-quinone monoimine intermediate for cycloaddition by controlling its formation rate, thus refraining from otherwise prerequisite steric or electronic stabilization and allowing efficient
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.
ZrCl4-Catalyzed Efficient Synthesis of Enaminones and Enamino Esters under Solvent-free Conditions
作者:Jin Lin、Li-Feng Zhang
DOI:10.1007/s00706-006-0565-2
日期:2007.1
A facile synthesis of beta-enaminones and enamino esters by condensation of beta-dicarbonyl compounds with differently substituted amines in the presence of ZrCl4 under solvent-free conditions is reported.
Zhang, Zhan-Hui; Song, Li-Ming, Journal of Chemical Research, 2005, # 12, p. 817 - 820