期刊
RSC ADVANCES
卷 7, 期 65, 页码 40929-40939出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra06168d
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资金
- Viet Nam National Foundation for Science and Technology Development (NAFOSTED) [104.01-2015.35, 14/2016/104/HDTN]
CuFe2O4 superparamagnetic nanoparticles were utilized as an effective recyclable heterogeneous catalyst for the synthesis of triphenylamines via the ligand-free selective ring-opening reaction of benzoxazoles or benzothiazoles with iodoarenes. The nano CuFe2O4 demonstrated noticeably higher catalytic efficiency than a series of homogeneous catalysts and heterogeneous catalysts. It was possible to separate the nano CuFe2O4 by using a magnet, and the recovered catalyst was reused many times while its activity could be maintained. To the best of our knowledge, this is the first example of heterogeneous catalysis for the transformation of benzoxazoles, and the transformation of benzothiazoles to triphenylamines has not been previously reported in the literature.
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