Graphene oxide: a reusable and metal-free carbocatalyst for the one-pot synthesis of 2-amino-3-cyanopyridines in water
作者:Dariush Khalili
DOI:10.1016/j.tetlet.2016.03.020
日期:2016.4
A one-pot synthesis of 2-amino-3-cyanopyridine derivatives has been demonstrated through the multicomponent reaction of aldehydes, ketones, malononitrile, and ammonium acetate using grapheneoxide as a heterogeneous catalyst in water as a green medium. The grapheneoxidecatalyst is very mild, effective, and most of its activity is preserved after being reused for five times.
Highly efficient four-component synthesis of 2-amino-3-cyanopyridines using doped nano-sized copper(I) oxide (Cu<sub>2</sub>O) on melamine–formaldehyde resin
作者:Somayeh Behrouz
DOI:10.3184/174751916x14709292404728
日期:2016.9
A convenient and facile four-component synthesis is described of 2-amino-3-cyanopyridine derivatives from readily available starting materials catalysed by doped nano-sized Cu2O on melamine–formaldehyde resin (nano-Cu2O–MFR). In this method, treatment of different aldehydes, ketones, malononitrile, and ammonium acetate in refluxing H2O/EtOH (1:1) in the presence of doped nano-Cu2O–MFR as a highly efficient
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.