Metal-Free Heterogeneous Semiconductor for Visible-Light Photocatalytic Decarboxylation of Carboxylic Acids
作者:Jiale Shi、Tao Yuan、Meifang Zheng、Xinchen Wang
DOI:10.1021/acscatal.0c05211
日期:2021.3.5
ceramic boron carbon nitrides (BCN). With visible light irradiation, BCN oxidize carboxylic acids to give carbon-centered radicals, which were trapped by hydrogen atom donors or employed in the construction of the carbon–carbon bond. In this system, both (hetero)aromatic and aliphatic acids proceed the decarboxylation smoothly, and C–H, C–D, and C–C bonds are formed in moderate to high yields (35 examples
用不含金属的陶瓷氮化硼碳(BCN)开发了一种适合的光催化脱羧羧酸的方法。在可见光照射下,BCN将羧酸氧化成以碳为中心的自由基,这些自由基被氢原子供体俘获或用于构建碳-碳键。在该系统中,(杂)芳族和脂肪族酸均能顺利进行脱羧反应,并以中等至高收率形成C–H,C–D和C–C键(35个实例,最高收率93%)。对照实验支持自由基过程,同位素实验表明甲醇被用作氢原子供体。循环测试和克级反应阐明了异质陶瓷BCN光氧化还原系统的实用性。它为有价值的碳自由基中间体的形成提供了均相催化剂的替代方法。此外,不含金属的系统还适用于消炎药(如萘普生和布洛芬)的后期功能化,这些功能丰富了化学工具箱。