Bimetallic Ag–Cu alloy nanoparticles as a highly active catalyst for the enamination of 1,3-dicarbonyl compounds
作者:Lipeeka Rout、Aniket Kumar、Rajendra S. Dhaka、Priyabrat Dash
DOI:10.1039/c6ra04569c
日期:——
Bimetallicnanoparticles, particularly those based on copper, have recently attracted a great deal of attention for the development of low cost and highlyactive catalysts due to the synergistic interaction between individual metal components. In this work, bimetallic Ag–Cu alloynanoparticles were explored as a highlyactive and reusable catalyst for the enamination of 1,3-dicarbonyls using diverse
Design of a graphene oxide-SnO<sub>2</sub> nanocomposite with superior catalytic efficiency for the synthesis of β-enaminones and β-enaminoesters
作者:Aniket Kumar、Lipeeka Rout、Rajendra S. Dhaka、Saroj L. Samal、Priyabrat Dash
DOI:10.1039/c5ra03363b
日期:——
A graphene–SnO2 nanocomposite has been synthesized by a solvothermal method, which is a more effective and less time-consuming catalyst for the synthesis of β-enaminones and β-enaminoesters.
Regioselective Iodine-Catalyzed Construction of Polysubstituted Pyrroles from Allenes and Enamines
作者:Yu Wang、Chen-Min Jiang、Hong-Liang Li、Fu-Sheng He、Xiaoyan Luo、Wei-Ping Deng
DOI:10.1021/acs.joc.6b01737
日期:2016.9.16
A novel I2-catalyzed tandem Michael addition/oxidative annulation of allenes and enamines for the construction of polysubstituted pyrroles has been developed. This protocol represents an efficient and highlyregioselective way to accessfunctionalizedpyrroles in moderate to excellent yields under mild conditions.
An efficient, one-pot synthetic protocol toward α-alkylidene-γ-butyrolacton-2-ones, a rather unexplored class of heterocyclic scaffolds starting from primary amines, methyl acetoacetate, and chloroacetyl chloride is described. The mixture of MeCN-MeOH as a polar solvent triggers a new cycloaddition of the enaminone intermediate. The reaction is completed within 12 hours under reflux condition to produce the title compounds.
Metal- and Solvent-Free Synthesis of m-Terphenyls by an Iodine-Catalyzed Tandem Formal [3+3]-Cycloaddition/Oxidation
作者:C. Uma Maheswari、Thangavel Pavithra、Gnanaoli Karthiyayini、Subbiah Nagarajan、Vellaisamy Sridharan
DOI:10.1055/a-1903-5174
日期:——
A tandem formal [3+3]-cycloaddition/oxidation between chalcones and β-enamine esters, employing iodine as a catalyst, was developed for the construction of various substituted m-terphenyls. A wide range of chalcones and β-enamine esters were tested under metal- and solvent-free conditions for the synthesis of substituted m-terphenyls in good to excellent yields in the presence of sulfur as an oxidant