Redox-Neutral Borylation of Aryl Sulfonium Salts via C-S Activation Enabled by Light.
Chen HuangJie FengRui MaShuaishuai FangTao LuWeifang TangDing DuJian GaoPublished in: Organic letters (2019)
Reported here is a novel photoinduced strategy for the borylation of aryl sulfonium salts using bis(pinacolato)diboron as the boron source. This method exploits redox-neutral aryl sulfoniums to gain access to aryl radicals via C-S bond activation upon photoexcitation under transition-metal-free conditions. Therefore, it grants access to diverse arylboronate esters with good performance from easily available aryl sulfoniums accompanied by mild conditions, operational simplicity, and easy scalability.
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