Palladium-Catalyzed\nCarbonylative Sonogashira Coupling\nof Aliphatic Alkynes and Aryl Thianthrenium Salts to Alkynones and\nFuranones

Herein, we developed a mild and efficient palladium-catalyzed\ncarbonylative\nSonogashira coupling of aryl thianthrenium salts with aliphatic alkynes\nand benzyl acetylene toward alkynones and furanones. Various desired\nproducts were prepared in good yields with broad functional group\ntolerance including the bromide group. In the case of using benzyl\nacetylene, the corresponding furanones can be obtained in good yields\nunder the same conditions with two molecules of CO inserted.