1264712-14-2Relevant articles and documents
Synthesis of functionalized dibenzothiophenes- An efficient three-step approach based on Pd-catalyzed C-C and C-S bond formations
Jepsen, Tue Heesgaard,Larsen, Mogens,Jorgensen, Morten,Solanko, Katarzyna A.,Bond, Andrew D.,Kadziola, Anders,Nielsen, Mogens Brondsted
supporting information; experimental part, p. 53 - 57 (2011/03/21)
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. A flexible and concise three-step protocol for the synthesis of functionalized dibenzothiophenes DBTs from readily available starting materials is presented. The method is based on two palladium-catalyzed reactions to prepare the masked thiophenols 4followed by deprotection and in situ cyclization to form the DBT skeleton. This approach offers improved functional-group tolerance as well as regiocontrol in the synthesis of functionalized DBTs as compared to previously reported methods.
