Upon treatment with catalytic Pd-2(dba)(3) . CHCl3 in the presence of AcOH, the enyne compounds were subjected to hydropalladation followed by cyclic carbopalladation to form the homoallylpalladium complexes, which subsequently underwent in situ Stille type cross coupling with various vinyltin reagents to give the cyclized products bearing allyl appendages. (C) 1997 Elsevier Science Ltd.