Catalytic arylation of carbon-carbon double bond followed by N- or O-cyclization

Under the catalytic action of palladium,o-hydroxy- oro-amino-substituted aryl iodides oxidatively add to palladium(0), insert strained or rigid olefins, and close the ring between the aliphatic carbon and theortho-functional group. This reaction occurs under mild conditions in the absence of phosphine ligands in a DMF solution and affords fused dihydrofurans or-pyrroles.