Four-component coupling of amines, aldehydes, 1,3-dicarbonyl compounds, and nitromethane has been achieved in gluconic acid aqueous solution (GAAS) to produce polysubstituted pyrroles in high yield. Gluconic acid aqueous solution could be recycled and reused several times without significant loss of its efficiency. (C) 2013 Elsevier Ltd. All rights reserved.
Nano-CoFe2O4 supported molybdenum as an efficient and magnetically recoverable catalyst for a one-pot, four-component synthesis of functionalized pyrroles
A novel magnetic nanoparticle CoFe2O4 supported Mo ([CoFe2O4@SiO2-PrNH2-Mo(acac)2]) was prepared and found to be a highly active and efficient catalyst for a one-potsynthesis of polysubstituted pyrroles viafour-componentreaction of aldehydes, amines, 1,3-dicarbonylcompounds and nitromethane. The easy recovery of the catalyst and reusability, broad substrate scopes, short reaction time, high yields
制备了新型的磁性纳米颗粒CoFe 2 O 4负载的Mo([CoFe 2 O 4 @SiO 2 -PrNH 2 -Mo(acac)2 ]),发现其是用于一锅法合成多取代基的高活性和高效催化剂。通过醛,胺,1,3-二羰基化合物和硝基甲烷的四组分反应生成吡咯。易于回收的催化剂和可重复使用性,广泛的底物范围,较短的反应时间,高收率的产品和无溶剂的条件,使该方案切实可行,对环境友好且在经济上具有吸引力。