Synthesis of 2,3-bis-organochalcogenyl-benzo[b]chalcogenophenes promoted by Oxone®

摘要: We report here an alternative and tunable metal-free synthesis of benzo[b]chalcogenophenes via the electrophilic cyclization 2-functionalized chalcogenoalkynes promoted by Oxone®. The use mild reaction conditions, efficiency generality are characteristics this new approach, which was suitable to convert different diselenides into a total twenty-two 2,3-bis-organochalcogenyl-benzo[b]chalcogenophenes, eighteen were synthesized for first time. compound 2-(butylselanyl)-3-(phenylselanyl)benzofuran used as substrate in Pd-catalyzed with phenylacetylene access Sonogashira's coupling derivative good yield.