Synthesis of Functionalized Dibenzothiophenes - An Efficient Three-Step Approach Based on Pd-Catalyzed C-C and C-S Bond Formations

A novel and efficient three-step protocol for synthesizing functionalized dibenzothiophenes (DBTs) from common starting materials and by using palladium-catalyzed carbon-carbon and carbon-sulfur bond formations is presented. The reaction conditions offer significantly improved functional-group tolerance and regioselectivity as compared to previously reported methods.