Co鈥揘鈥揅 Catalyst for C鈥揅 Coupling Reactions: On the Catalytic Performance and Active Sites

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• 作者：Leilei Zhang ; Aiqin Wang ; Wentao Wang ; Yanqiang Huang ; Xiaoyan Liu ; Shu Miao ; Jingyue Liu ; Tao Zhang
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：5
• 期：11
• 页码：6563-6572
• 全文大小：642K
• ISSN：2155-5435

文摘

C鈥揅 bond-forming reactions are important in chemistry for construction of complex large molecules from readily available simple substrates. However, they usually involve the employment of organic halides and suffer from toxic or environmental issues. We report an efficient and environmentally benign methodology鈥攁erobic oxidative cross-coupling of primary and secondary alcohols鈥攖o directly produce 伪,尾-unsaturated ketones that are key intermediates for synthesis of agrochemical, pharmaceutical, and other fine chemicals. A noble-metal-free Co鈥揘鈥揅 catalyst, derived from pyrolysis of cobalt鈥損henanthroline complexes on a mesoporous carbon support, is developed toward the target reactions and shows high catalytic activity (turnover frequency of 3.8 s^鈥? based on Co single atoms, surpassing the state of art in the literature), good recyclability, and wide applicability to diverse substrates (28 examples). The active sites in the Co鈥揘鈥揅 catalyst are proposed to be Co single atoms bonded with N within graphitic sheets.