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Magnetic Fe3O4 nanoparticles supported imine/Thiophene‐nickel (II) complex: A new and highly active heterogeneous catalyst for the synthesis of polyhydroquinolines and 2, 3‐dihydroquinazoline‐4(1H)‐ones
Author(s) -
Shiri Lotfi,
Heidari Leili,
Kazemi Mosstafa
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3943
Subject(s) - catalysis , chemistry , imine , thiophene , nickel , fourier transform infrared spectroscopy , spectroscopy , infrared spectroscopy , nanoparticle , absorption spectroscopy , scanning electron microscope , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , materials science , physics , quantum mechanics , engineering , composite material
A new magnetically separable nickel catalyst (Ni(NO 3 ) 2− Imine/Thiophene‐Fe 3 O 4 @SiO 2 ) was readily prepared and structurally characterized by Fourier transform infrared spectroscopy (FT‐IR), Scanning electron microscopy (SEM), Energy‐dispersive X‐ray spectroscopy (EDX), Vibrating sample magnetometer (VSM), X‐Ray diffraction (XRD) and Atomic absorption spectroscopy (AAS). The Ni(NO 3 ) 2− Imine/Thiophene‐Fe 3 O 4 @SiO 2 exhibited efficient catalytic activity in the synthesis of 2,3‐dihydroquinazoline‐4(1H)‐ones and polyhydroquinolines. Catalysis research under water and solvent‐free conditions makes also this synthetic protocol ideal and fascinating from the environmental point of view. The catalyst can be magnetically recovered after the reaction and can be reused for many times without appreciable decrease in activity.