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The immobilized Ni(II)‐thiourea complex on silica‐layered copper ferrite: A novel and reusable nanocatalyst for one‐pot reductive‐acetylation of nitroarenes
Author(s) -
Zeynizadeh Behzad,
Shokri Zahra,
Hasanpour Galehban Morteza
Publication year - 2019
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.4771
Subject(s) - chemistry , thiourea , sodium borohydride , catalysis , acetanilide , nuclear chemistry , copper , nanocomposite , nitro , bimetallic strip , heterogeneous catalysis , inorganic chemistry , organic chemistry , chemical engineering , alkyl , engineering
In this study, magnetically nanoparticles of CuFe 2 O 4 @SiO 2 @PTMS@Tu@Ni(II) as novel and reusable catalyst were prepared. Synthesis of the Ni (II)‐nanocatalyst was carried out through the complexation of Ni(OAc) 2 ·4H 2 O with the immobilized thiourea on silica‐layered CuFe 2 O 4 . The prepared nanocomposite system was then characterized using SEM, EDX, XRD, VSM, ICP‐OES, Raman, UV–Vis and FT‐IR analyses. Catalytic activity of the Ni(II)‐CuFe 2 O 4 system was investigated towards rapid reduction of aromatic nitro compounds to arylamines with sodium borohydride as well as one‐pot reductive‐acetylation of nitroarenes to acetanilides with NaBH 4 /Ac 2 O system without the isolation of intermediate arylamines. All reactions were carried out in H 2 O within 3–7 min to afford the products arylamines/acetanilides in high to excellent yields. Reusability of the Ni(II)‐nanocatalyst was examined for seven consecutive cycles without the significant loss of the catalytic activity.