Functionalized fluorenones/fluorenes are generally synthesized via cross-coupling reactions. Described here is the modification of the fluorene/fluorenone core via a C–H functionalization tactic and augmentation of the fluorenes/fluorenones library.
A general and authoritative literature overview on Pd-catalyzed cross-dehydrogenative coupling reactions of (hetero)arenes from the origins to 2023, where not only the synthetic aspects were described but also the most relevant mechanistic features.
Photocatalyst-free synthesis of benzo[b]fluorenones and benzo[b]fluorenols enabled by self-photocatalysis featuring multiple activities, including energy, electron and atom transfers and photocycloaddition.
Intermediate dihydrodibenzothiophene dioxides underwent different types of aromatization patterns to afford arenes as well as heteroarenes depending upon the nature of substituents, solvents and temperature.
This report illustrates the rapid construction of two divergent classes of polycyclic frameworks, benzo[a]fluorenones and spiro-chromenone indenes, via a double Heck cascade and an acid-driven cyclization from easily accessible precursors.