Organic Process Research and Development p. 1093 - 1096 (2016)
Update date:2022-08-17
Topics:
He, Jian
Lin, Fu
Yang, Xufang
Wang, Di
Tan, Xiaohua
Zhang, Shujun
A new cobalt-based heterogeneous catalyst was prepared by adsorbing in situ produced nitrogen-ligated cobalt(II) acetate complexes on commercially available SiO2 and subsequent pyrolysis at 800 °C for 2 h under N2 atmosphere. By applying this catalyst under the O2 balloon, the aerobic oxidation of phenolic imines proceeded smoothly and gave various 2-arylbenzoxazoles in good yields. Meanwhile, on the basis of the experimental results, a plausible reaction pathway was described to elucidate the reaction mechanism.
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