摘要
Treatment of alkenyl and aryl iodides and bromides containing an appropriate α, β-unsaturated carbonyl group with a catalytic amount (3-5 mol %) of either a Pd(O) or a Pd(II) complex, e.g., Pd(PPh 3 ) 4 , and a base, e.g., NEt 3 , can induce highly regioselective cyclization via intramolecular carbopalladation; formation of exocyclic alkenes can also be highly stereoselective. © 1988.