A co-operative effect of visible light photo-catalysis and CoFe<sub>2</sub>O<sub>4</sub> nanoparticles for green synthesis of furans in water
作者:Fooleswar Verma、Puneet K. Singh、Smita R. Bhardiya、Manorama Singh、Ankita Rai、Vijai K. Rai
DOI:10.1039/c6nj04091h
日期:——
A novel approach to poly-functionalized furansynthesis is disclosed via oxidative decarboxylative [3+2] cycloaddition using co-operative catalysis by visible light and CoFe2O4 nanoparticles under ambient reaction conditions with water as a solvent. Although the reported method is efficient without catalyst in the presence of visible light (70% yield in 4 h at rt), the use of catalyst not only increases
在环境反应条件下,以水为溶剂,通过可见光和CoFe 2 O 4纳米粒子的协同催化,通过氧化脱羧[3 + 2]环加成反应,公开了一种多官能化呋喃合成的新方法。尽管所报道的方法在可见光存在下不使用催化剂也是有效的(在室温4小时内产率为70%),但使用催化剂不仅可以提高产率(91%),而且可以加快转化率(在室温2小时) 。
Copper-catalyzed regioselective synthesis of furan via tandem cycloaddition of ketone with an unsaturated carboxylic acid under air
A catalytic decarboxylative annulation has been developed for the regioselective synthesis of trisubstituted furans by the cycloaddition of ketones with α,β-unsaturated carboxylic acids under ambient air. A library of furan derivatives were obtained in good yields from the readily available substrates in the combination of a catalytic amount of Cu-salt and a stoichiometric amount of water. Water plays
Synthesis of Polysubstituted Furans via Copper-Mediated Annulation of Alkyl Ketones with α,β-Unsaturated Carboxylic Acids
作者:Yuzhu Yang、Jinzhong Yao、Yuhong Zhang
DOI:10.1021/ol400912v
日期:2013.7.5
A novel copper-mediated annulation of alkyl ketones with alpha,beta-unsaturated carboxylic acids has been accomplished. This reaction provides a facile and regio-defined method for the synthesis of 2,3,5-trisubstituted furans from simple chemical reagents.
Regioselective Synthesis of Multisubstituted Furans via Copper-Mediated Coupling between Ketones and β-Nitrostyrenes
A copper-mediated intermolecular annulation of alkyl ketones and beta-nitrostyrenes has been developed for the regioselective synthesis of multisubstituted furan derivatives in good yields. This protocol is applicable to both cyclic and acyclic ketones.