Palladium-catalyzed synthesis of novel tetra- and penta-cyclic biologically active benzopyran- and pyridopyran-containing heterocyclic systems

Abstract

Syntheses of novel tetra-and penta-cyclic benzopyran and pyridopyran derivatives, via direct intramolecular arylation of 2-iodophenoxymethylhetarenes and 3-(2-bromo-pyridin-3-yloxymethyl)-benzo [4,5]