A simple and straightforward approach for the regioselective synthesis of pyranocoumarin
and bis-fused benzo-2H-pyran derivatives using mild, easy to handle, and cheaper molecular iodine mediated
heterocyclization is described.
Key words
molecular iodine - 6-
endo-dig - electrophilic cylization - bis-fused benzo-2
H-pyrans - pyranocoumarins