Rc. Larock et al., PALLADIUM-CATALYZED ANNULATION OF 1,4-DIENES USING ORTHO-FUNCTIONALLY-SUBSTITUTED ARYL HALIDES, Journal of organic chemistry, 58(17), 1993, pp. 4509-4510
The palladium-catalyzed annulation of 1,4-dienes by aryl halides beari
ng ortho-heteroatoms and carbanion-stabilizing groups affords monocycl
ic and bicyclic 6-membered ring heterocycles and carbocycles in high y
ields by a process involving arylpalladium formation and addition to t
he diene, palladium migration, and intramolecular pi-allylpalladium di
splacement.