Nucleophilic addition of benzylboronates to activated ketones
作者:Jacob C. Hayes、Michael R. Hollerbach、Timothy J. Barker
DOI:10.1016/j.tetlet.2019.151505
日期:2020.2
method has been developed for the addition of benzylboronic acid pinacol ester to activated ketones including trifluoromethyl ketones in good yields. The use of DABCO as an additive was found to enhance the rate and efficiency of this reaction. In reactions of ketones with a second carbonyl group present such as an ester or amide, good chemoselectivity for the ketone was observed. Competition experiments
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 dualroles of benzyl trifluoroborates enable aldehydes, ketones, diketones, and ketone esters to react with benzyl trifluoroborates to