Ni-catalyzed addition reaction of allylic selenides to alkynes

Nickel complex catalysts, Ni(cod)(2)-2PPh(3) and Ni(cod)(2)-dppb systems in particular, catalyze the addition reactions of phenyl allyl selenide to terminal alkynes to regioselectively afford 2-phenylseleno-l-allyl-l-alkenes in good to excellent yields. A mechanism that involves a eta(3)-allyl-nickel complex is proposed on the basis of isolation, crystal structure determination and reactivity study of the complex. (c) 2007 Elsevier Ltd. All rights reserved.