COUPLING POLYMERIZATION OF MONOFUNCTIONAL ALLENE DERIVATIVES WITH MALONATES BEARING ARYL HALIDES MOIETIES VIA PI-ALLYLPALLADIUM COMPLEX

A novel polymerization method of allene derivatives With nucleophiles bearing aryl halide moieties (A-B type) is described. By the polymeriz ation of hexylallene with malonates bearing an aryl iodide part, polym ers consisting both of internal and exomethylene (exo) double bonds we re obtained by mean of the coupling reaction of three different compon ents in high yields. On the other hand, a polymer obtained from phenyl allene was selectively composed of internal double bonds (E and Z). By the reaction of hexylallene with a malonate bearing two aryl halide m oieties (A-B-2 type), a multibranched polymer was also obtained. (C) 1 997 John Wiley & Sons, Inc.