Sustainable Synthesis of 2-Arylbenzoxazoles over a Cobalt-Based Nanocomposite Catalyst

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• 作者：Jian He ; Fu Lin ; Xufang Yang ; Di Wang ; Xiaohua Tan ; Shujun Zhang
• 刊名：Organic Process Research & Development
• 出版年：2016
• 出版时间：June 17, 2016
• 年：2016
• 卷：20
• 期：6
• 页码：1093-1096
• 全文大小：315K
• 年卷期：0
• ISSN：1520-586X

文摘

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.