Abstract Chemistry has been developed that allows for the synthesis of a series of novel tricyclic thioxanthen-9-one-10, 10-dioxides. A regioselective synthesis of the novel core substrate 3-chlorothioxanthen-9-one-10, 10-dioxide was achieved in 85% yield over three steps without the need for chromatographic purification. Subsequent microwave-assisted coupling methodology afforded the desired novel 3-substituted tricyclic compounds in ...
