Cu(II) and Fe(III) Complexes Derived from N-Acetylpyrazine-2-Carbohydrazide as Efficient Catalysts Towards Neat Microwave Assisted Oxidation of Alcohols

被引：13
|
作者：
Sutradhar, Manas [1 ]
Barman, Tannistha Roy [1 ]
Pombeiro, Armando J. L. [1 ]
Martins, Luisa M. D. R. S. [1 ]
机构：
[1] Univ Lisbon, Inst Super Tecn, Ctr Quim Estrutural, Av Rovisco Pais, P-1049001 Lisbon, Portugal
来源：
CATALYSTS | 2019年 / 9卷 / 12期
关键词：
Cu(II) complex; carbohydrazide; X-ray structure; alcohol oxidation; microwave assisted; PEROXIDATIVE OXIDATION; COORDINATION POLYMERS; AROYLHYDRAZONE; LIGANDS; PRECURSORS; ALDEHYDES; MAGNETISM; CRYSTAL; KETO;
D O I：
10.3390/catal9121053
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The mononuclear Cu(II) complex [Cu((kNN'O-HL)(H2O)(2)] (1) was synthesized using N-acetylpyrazine-2-carbohydrazide (H2L) and characterized by elemental analysis, IR spectroscopy, ESI-MS and single crystal X-ray crystallography. Two Fe(III) complexes derived from the same ligand viz, mononuclear [Fe((kNN'O-HL)Cl-2] (2) and the binuclear [Fe(kNN'O-HL)Cl(mu-OMe)](2) (3) (synthesized as reported earlier), were also used in this study. The catalytic activity of these three complexes (1-3) was examined towards the oxidation of alcohols using tert-butyl hydroperoxide (TBHP) as oxidising agent under solvent-free microwave irradiation conditions. Primary and secondary benzyl alcohols (benzyl alcohol and 1-phenylethanol), and secondary aliphatic alcohols (cyclohexanol) were used as model substrates for this study. A comparison of their catalytic efficiency was performed. Complex 1 exhibited the highest activity in the presence of TEMPO as promoter for the oxidation of 1-phenylethanol with a maximum yield of 91.3% of acetophenone.
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页数：15
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