Visible-Light-Catalyzed Radical–Radical Cross-Coupling Reaction of Benzyl Trifluoroborates and Carbonyl Compounds to Sterically Hindered Alcohols
作者:Hao-Luo Jiang、Yu-Hao Yang、Yan-Hong He、Zhi Guan
DOI:10.1021/acs.orglett.2c01583
日期:2022.6.17
require any external oxidants or reductants. In this reaction, benzyl trifluoroborates are oxidized by excited-state 4Cz-IPN to generate benzyl radicals, and the resulting boron trifluoride acts as a Lewis acid to reduce the reduction potential of carbonyl compounds. The dual roles of benzyl trifluoroborates enable aldehydes, ketones, diketones, and ketone esters to react with benzyl trifluoroborates to
我们在此报告了一种基于持久自由基效应 (PRE) 的有机染料催化的直接自由基交叉偶联反应,该反应由可见光驱动,不需要任何外部氧化剂或还原剂。在该反应中,三氟硼酸苄酯被激发态 4Cz-IPN 氧化生成苄基自由基,生成的三氟化硼作为路易斯酸降低羰基化合物的还原电位。三氟硼酸苄酯的双重作用使醛、酮、二酮和酮酯能够与三氟硼酸苄酯反应生成各种位阻醇。