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Synfacts 2014; 10(10): 1101
DOI: 10.1055/s-0034-1379194
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

Oxidation of Benzylic C–H Bonds with ­HKUST-1@Fe3O4

Contributor(s):
Yasuhiro Uozumi
,
Yoichi M. A. Yamada
,
Heeyoel Baek
Hu C, * Wang B. * et al. Beijing Institute of Technology and Liaocheng University, P. R. of China
Facile Fabrication of Magnetically Recyclable Metal-Organic Framework Nanocomposites for Highly Efficient and Selective Catalytic Oxidation of Benzylic C–H Bonds.

Chem. Commun. 2014;
50: 8374-8377
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Publication History

Publication Date:
17 September 2014 (online)

 
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Key words

metal-organic framework - oxidation - iron oxide - heterogeneous catalysis

Significance

The magnetic core–shell nanocomposites HKUST-1@Fe3O4 were prepared from Fe3O4-CO2H (Φ 20 nm), polyvinylpyrrolidone (PVP), Cu(OAc)2, and trimesic acid (BTC), in which the iron-based nanoparticles were encapsulated by the resulting HKUST-1 shell [for the copper-­organic framework of Cu(OAc)2 and trimesic acid, see: Chui et al. Science 1999, 283, 1148]. The ­oxidation of benzylic C–H bonds was carried out with HKUST-1@Fe3O4 and TBHP to give the corresponding desired carbonyl products in up to >99% conversion and >99% selectivity.


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Comment

The catalyst was characterized by SEM, HR-TEM, PXRD, BET, and FT-IR analyses. Elemental analysis revealed a ratio of copper and iron of 19.34% and 28.63%. The catalyst was recovered by an external magnet and reused twice without significant loss of the catalytic activity.


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