132 research outputs found
A Simple and Efficient Synthesis of 12-Aryl-8,9,10,12- tetrahydrobenzo[a]xanthen-11-ones by ZnO Nanoparticles Catalyzed Three Component Coupling Reaction of Aldehydes, 2-Naphthol and Dimedone
Get PDFHighly effective zinc oxide nanoparticles catalyzed solvent-free synthesis of some tetrahydrobenzo[a]xanthen-11-one derivatives via one-pot multi-component reaction of aldehydes, 2-naphthol and dimedone. The present approach creates a variety of biologically active heterocyclic compounds in excellent yields and short reaction times. Four new compounds are reported. The salient features of the ZnO nanoparticles are: easy preparation, cost-effective, high stability, low loading and reusability of the catalyst. The prepared zinc oxide nanoparticles were fully characterized by EDX, XRD, SEM, IR and TEM analysis.KEYWORDS: ZnO, nanoparticles, tetrahydrobenzo[a]xanthen-11-one, multi-component reactions, heterocyclic compounds
Chemical composition and antimicrobial activity of the essential oil from the leaves and flowers of Aloysia gratissima
Full text linkIntroduction of W-doped ZnO nanocomposite as a new and efficient nanocatalyst for the synthesis of biscoumarins in water
Get PDFCuI nanoparticles: a highly active and easily recyclable catalyst for the synthesis of 2-amino-3,5-dicyano-6-sulfanyl pyridines
No full textA one-pot synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones catalyzed by iron(III) phosphate under solvent-free condition
No full textFeCl3.nano SiO2: An Efficient Heterogeneous Nano Catalyst for the Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes and 1,8-Dioxo-octahydro-xanthenes under Solvent-free Conditions
Get PDFA novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes is described through one-pot condensation of 2-naphthol and dimedone with aryl aldehydes in the presence of nano silica-supported ferric chloride under solvent-free conditions. The present approach offers several advantages such as short reaction times, high yields, easy purification, recovery and reusability of the catalyst.Keywords: Xanthenes, nano silica, ferric chloride, multi-component reactions, solvent-fre
KCCâ1 aminopropylâfunctionalized supported on iron oxide magnetic nanoparticles as a novel magnetic nanocatalyst for the green and efficient synthesis of sulfonamide derivatives
No full textL-phenyl alanine-attached Fe3O4@SiO2 nanoparticles as an efficient catalyst for the synthesis of chromenes
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