Pd-catalyzed atom-economic couplings of triarylbismuth reagents with 2-bromo- and 2,6-dibromochromones and synthesis of medicinally important fisetin

- Cross-couplings of bromochromones with triarylbismuth reagents.
- Utilizes triarylbismuths as threefold arylating reagents.
- Regio-selective mono-arylations and di-arylations.
- Delivers 2-arylchromones in high yields under palladium catalysis.
- Synthesis of medicinally important fisetin in high yield demonstrated.