A simple facile one-step microwave-enhancedsynthesis of methyl 4-substituted-6-amino-5-cyano-2-methylpyridine-3-carboxylate derivatives via a three-component reaction of aromatic aldehydes, malononitrile, and methyl 3-aminobut-2-enoate has been developed. It is an efficient and promising synthetic strategy to build the polyfunctional pyridine skeleton. J. Heterocyclic Chem., (2009)
A Multicomponent Synthesis of 2-Amino-3-cyanopyridine Derivatives Catalyzed by Heterogeneous and Recyclable Copper Nanoparticles on Charcoal
作者:Reza Khalifeh、Mahdiyeh Ghamari
DOI:10.5935/0103-5053.20150327
日期:——
An efficient and convenient method was developed for synthesis of 2-amino-3-cyanopyridine derivatives via the four-component coupling reaction between ketone, aldehyde, malononitrile, and ammonium acetate in the presence of 2 mol% copper nanoparticles on charcoal (Cu/C) catalyst. A variety of ketones and aldehydes was used to afford the corresponding products in good to excellent yields. The method is applicable to large-scale operation without any problem. The catalyst could be quantitatively recovered from the reaction mixture by simple filtration and reused at least eight times with almost consistent activity.