Continuous-flow Fe-zeolite-catalyzed temperature-directed synthesis of bioactive tetraketones and xanthenes using epoxides and cyclic-1,3-diketones via a Meinwald rearrangement

The continuous flow Fe-zeolite-catalyzed direct transformation of epoxides and cyclic-1,3-diketones to tetraketones and their subsequent catalytic cyclization to xanthene derivatives are described.