Divergent Synthesis Of Flavones And Flavanones From 2 '-Hydroxydihydrochalcones Via Palladium(Ii)-Catalyzed Oxidative Cyclization

Divergent and versatile synthetic routes to flavones and flavanones via efficient Pd(ii) catalysis are disclosed. These Pd(ii) catalyses expediently provide a variety of flavones and flavanones from 2 '-hydroxydihydrochalcones as common intermediates, depending on oxidants and additives, via discriminate oxidative cyclization sequences involving dehydrogenation, respectively, in a highly atom-economic manner.