The chromenone core is an ubiquitous group in biologically active natural products
and has been extensively used in organic synthesis. Fluorine-derived compounds, including
those with a trifluoromethyl group (CF3), have shown enhanced biological activities in numerous pharmaceuticals compared
with their non-fluorinated analogues. 2-Trifluoromethylchromenones can be readily
functionalized at the 8- and 7-positions, providing chromenones cores of high structural
complexity, which are excellent precursors for numerous trifluoromethyl heterocycles.
Key words
fluorine - chromenone - trifluoromethyl heterocycle synthesis - palladium-catalyzed
coupling