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Organic Photoredox-Catalyzed Hydrosilylation of Vinylboronic Esters for the Synthesis of Geminal and Vicinal Borosilanes

Yue Zhang,Ting Wang,Yuan-Yuan Liu,Zheng-Bing Zhang,Pan Han,Linhai Jing

Geminal and vicinal borosilanes have unique applications in functional materials and synthetic transformations. Herein, a convenient method for the synthesis of geminal and vicinal borosilanes is developed via photoredox metal-free hydrosilylation of vinylboronic esters. This strategy features the advantages of high atom economy, environmental friendliness, and excellent functional group compatibility. The mechanism studies reveal that the catalytic reaction goes through photoredox HAT catalysis and a radical addition pathway.