Recent Progress in Three-Component Reactions. An Update

One-pot, three-component reaction using modified Julia reagents: a facile synthesis of 4,5-disubstituted 1,2,3-(NH)-triazoles in a wet organic solvent

A new one-pot, three component reaction involving the use of Julia reagent, aldehyde, and sodium azide was developed for the efficient synthesis of N-unsubstituted 1,2,3-triazoles. This reaction could be carried out under mild reaction conditions without any precaution, and broad scope of substrates, both respect to Julia reagents and aldehydes, could be applied in this reaction system in generation of a small library of title compounds.

Efficient, One-Pot Synthesis of Polyfunctionalised Octahydroquinazolin-2,5-Diones Catalysed by Fe3O4 Nanoparticles

Using an efficient and eco-friendly approach, 14 4-aryl-7,7-dimethyl-1,2,3,4,5,6,7,8-octahydroquinazolin-2,5-diones (and six of their 2-thione analogues) were prepared in good yields and in short reaction times by a three-component reaction of an araldehyde, dimedone and urea (or thiourea) using Fe3O4 nanoparticles in aqueous ethanol under reflux conditions. The Fe3O4 nanoparticles, which were easily prepared and could be recycled, were fully characterised by TEM, SEM, XRD, EDX, VSM and FTIR analysis.

Synthesis and characterization of novel nanosilica molybdic acid and its first catalytic application in the synthesis of new and known pyranocoumarins

Nanosilica molybdic acid as an effective and environmentally safe heterogeneous catalyst has been developed for the synthesis of pyranocoumarins.

C3 functionalization of indolizines via In(iii)-catalyzed three-component reaction

Post-functionalization at the C3 position of indolizines via In(iii)-catalyzed three-component coupling reaction with amines and aldehydes allowed rapid access to a new class of indolizines with diverse functional groups at the C3 position in good to excellent yields.

An Efficient, One-Pot Synthesis of Polyfunctionalised Dihydropyridines Catalysed by AgI Nanoparticles

Polyfunctionalised dihydropyridines were synthesised in high yields and in short reaction times by a four-component reaction of araldehydes, dimedone, ethyl acetoacetate and ammonium acetate in the presence of AgI nanoparticles in aqueous ethanol media under reflux conditions. The catalyst was easily prepared and was recyclable.

In situ Bronsted-Lowry acid catalyzed syntheses, characterization, single crystal XRD, electronic spectral-, DPPH radical scavenging-, and DNA protection studies of aryl-3,3'-bis(indolyl)methanes

A series of novel aryl-3,3'-bis(indolyl)methanes (BIMs) were synthesized using indole and formylphenoxyaliphatic acid(s) in water in the absence of any catalyst. The formylphenoxyaliphatic acid behaves as an in situ Bronsted-Lowry acid catalyst in water. UV-Visible and fluorescence spectra of the compounds were recorded in selected solvents. The gas phase geometry optimization of the compounds were achieved using DFT calculations at B3LYP/3-21G((*)) level of theory. The electronic properties, such as HOMO-LUMO energies were calculated using the above method based on the optimized structure. Compounds have better DPPH radical scavenging activity and reduction of oxidative damage of DNA.

Efficient three-component coupling reactions catalyzed by Cu0-nanoparticles stabilized on modified montmorillonite

In situgeneration of Cu⁰-nanoparticles into the nanopores of environmentally benign modified montmorillonite clay and their catalytic performance in three component (A³) coupling reactions of aldehyde, amine and alkyne to synthesize propargylamines with excellent yields and selectivity.

Efficient one-pot synthesis of propargylamines catalysed by gold nanocrystals stabilized on montmorillonite

Size selective Au⁰-nanoparticles were generatedin situin the nanopores of montmorillonite and applied in the one-pot, three-component coupling of an aldehyde, an amine and an alkyne to synthesize propargylamines.

The preparation and characterization of boehmite nanoparticles-TAPC: a tailored and reusable nanocatalyst for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones

TAPC supported on boehmite nanoparticles (BNPs-TAPC) as novel, eco-friendly, and recyclable nanocatalyst for the synthesis of title compounds under solvent-free conditions is reported.

10-Camphorsulfonic acid ((±)-CSA) catalyzed facile one-pot synthesis of a new class of 2,5-disubstituted 1,3,4-oxadiazoles

A convenient, and efficient one-pot synthesis of 2,5-disubstituted-1,3,4-oxadizoles is described.