Rhodium‐Catalyzed Intermolecular C–H Silylation of Indoles with Silacyclobutanes

Comprehensive Summary Silylation of C–H bond has been established to be an important strategy toward construction of complex organosilicons. Still, the state‐of‐the‐art is mostly limited to intramolecular reactions or limited to employment of thiophenes or reactive arene reagents. Herein, rhodium‐catalyzed intermolecular C–H silylation of indoles has been realized using silacyclobutanes as a silylating reagent, affording a variety of C2‐silylated indoles. This chelation‐assisted C–H silylation system proceeds well with a broad substrate scope with 100% atom‐economy.