Recyclable Bi sub(2)WO sub(6)-nanoparticle mediated one-pot multicomponent reactions in aqueous medium at room temperature

Different types of multicomponent reactions (MCRs) are reported using Bi sub(2)O sub(3), BiVO sub(4), and Bi sub(2)WO sub(6) (nanoparticle) as heterogeneous catalysts. Among these, Bi sub(2)WO sub(6) nanoparticles showed excellent reactivity for the synthesis of functionalized dihydropyridine, polyh...

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Bibliographic Details
Published in:RSC advances 2014-10, Vol.4 (97), p.54168-54174
Main Authors: Paplal, Banoth, Nagaraju, S, Veerabhadraiah, Palakollu, Sujatha, Kodam, Kanvah, Sriram, Vijaya Kumar, B, Kashinath, Dhurke
Format: Article
Language:English
Subjects:
Ambient temperature
Catalysis
Catalysts
Catalytic activity
Derivatives
Nanoparticles
Nanostructure
Synthesis
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Summary:Different types of multicomponent reactions (MCRs) are reported using Bi sub(2)O sub(3), BiVO sub(4), and Bi sub(2)WO sub(6) (nanoparticle) as heterogeneous catalysts. Among these, Bi sub(2)WO sub(6) nanoparticles showed excellent reactivity for the synthesis of functionalized dihydropyridine, polyhydroquinoline, 4H-chromene and 2-amino-4H-benzo[b]pyran derivatives at ambient temperature in aqueous medium. All the reactions gave good to excellent yields in 10-45 minutes in the presence of 5 mol% (optimized) of the catalyst. The catalyst was regenerated and reused up to 5 times without losing catalytic activity. The gram scale synthesis of dihydropyridine gave the desired product in 82% yield in 2 h.
ISSN:2046-2069
DOI:10.1039/c4ra07708c