Magnetic Copper Ferrite Nanoparticles: An Inexpensive, Efficient, Recyclable Catalyst for the Synthesis of Substituted Benzoxazoles via Ullmann-Type Coupling under Ligand-Free Conditions
Daoshan Yang, Xiao Zhu, Wei Wei, Min Jiang, Ning Zhang, Dandan Ren, Jinmao You, Hua Wang*
*Shandong Province Key Laboratory of Life-Organic Analysis, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. of China, Email: huawang_qfnu126.com
D. Yang, X. Zhu, W. Wei, M. Jiang, N. Zhang, D. Ren, J. You, H. Wang, Synlett, 2014, 25, 729-735.
DOI: 10.1055/s-0033-1340599 (free Supporting Information)
Readily available, air-stable, recyclable copper(II) ferrite nanopartices serve as a catalyst in a sustainable synthesis of benzoxazoles from substituted N-(2-halophenyl)benzamides. The nanocatalyst can be completely recovered with an external magnet and can be used seven times without significant loss of catalytic activity.
see article for more examples
nanostructures, catalysts, copper, iron, benzoxazoles, cyclizations, coupling