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An ExpeditiousSynthesis of Spiro[chromeno[2,3‐c]pyrazole‐4,3′‐indolin]‐2′5‐diones Catalysed by RecyclableSpinel ZnFe 2 O 4 Nanopowder
Author(s) -
De Kajal,
Bhanja Piyali,
Bhaumik Asim,
Mukhopadhyay Chhanda
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700643
Subject(s) - catalysis , high resolution transmission electron microscopy , pyrazole , oxide , spinel , x ray photoelectron spectroscopy , adsorption , chemistry , inorganic chemistry , heterogeneous catalysis , oxidation state , pyrazolone , materials science , chemical engineering , organic chemistry , nanotechnology , metallurgy , transmission electron microscopy , engineering
An improved environmentally benign one‐pot three‐component approach for the synthesis of pyrazole‐fused chromene derivatives has been described by the reaction of substituted isatins, cyclic‐1,3‐diketones and 1‐phenyl pyrazolone in presence of spinelzincferrite nanopowder catalyst using water as reaction medium.The spinel zincferrite nanopowder catalyst has been prepared via a low temperature preparative technique and the catalyst has been thoroughly characterized by XRD, HRTEM, EDS and N 2 ‐adsorption analysis. Besides, XPS analysis has been carried out to investigate the actual electronic environment and oxidation state of the elements. The reaction is facilated in presence of the catalyst due to two different catalytic functions, an acidic one obtained from Fe(III) ions and the oxide ion incorporated within the ZnFe 2 O 4 metal oxide framework provides the basic character.