Abstract
Several approaches toward electrophilic C-H silylation of electron-rich arenes are discussed, comprising transition-metal-catalyzed processes as well as Lewis-acid-and Bronsted-acid-induced protocols. These methods differ in the catalytic generation of the silicon electrophile but share proton removal in form of dihydrogen. With slight modifications, these methods are often also applicable to the related electrophilic C-H borylation.