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Quaternary Vanado‐Molybdotungstophosphoric Acid [H 5 PW 6 Mo 4 V 2 O 40 ] Over Natural Montmorillonite as a Heterogeneous Catalyst for the Synthesis 4 H ‐Pyran and Polyhydroquinoline Derivatives
Author(s) -
Aher Dipak S.,
Khillare Kiran R.,
Chavan Laxmikant D.,
Shankarwar Sunil G.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001065
Subject(s) - catalysis , montmorillonite , thermogravimetric analysis , inductively coupled plasma , materials science , nuclear chemistry , fourier transform infrared spectroscopy , transmission electron microscopy , scanning electron microscope , differential thermal analysis , infrared spectroscopy , vanadium , analytical chemistry (journal) , chemistry , chemical engineering , diffraction , organic chemistry , nanotechnology , metallurgy , plasma , physics , optics , quantum mechanics , engineering , composite material
Synthesis of an efficient and novel vanadium substituted molybdotungstophosphoric acid, H 5 PW 6 Mo 4 V 2 O 40 .14H 2 O (VMWP) supported on naturally occurring montmorillonite (nMont) clay by an incipient wetness impregnation technique. The support and resulting catalyst were characterized by Inductively coupled plasma atomic emission spectroscopy (ICP‐AES), Fourier transform infrared (FT‐IR), powder X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X‐ray analysis (EDX), Transmission electron microscopy (TEM) and thermogravimetric‐Differential thermal analysis (TG‐DTA). The study demonstrated that newly synthesized VMWP well incorporated on nMont with their good performance and activity. The catalytic application is evaluated in one‐pot multicomponent synthesis of tetrahydrobenzo[ b ]pyrans (4 H ‐Pyran) and polyhydroquinolines in excellent yield. High conversion, shorter reaction time, environmentally benign solvent simple experimental and work procedure and reusability of the catalyst are the prominent features of our synthetic route.