3-COMPONENT COUPLING POLYMERIZATION OF BISALLENE, ARYL DIHALIDES, ANDNUCLEOPHILES VIA PI-ALLYLPALLADIUM COMPLEX .2. EFFECT OF NUCLEOPHILESON POLYMERIZATION

A novel palladium-catalyzed three-component polycondensation of 1,2,10 ,11-dodecatetraene, 4,4'-diiodobiphenyl, and nucleophiles was carried out using various carbanions and amines as a nucleophilic part. The po lymerization with various sodium diethyl malonates produced polymers i n high yields. Particularly, no exo-double bond was detected in the po lymers prepared from sodium diethyl malonates bearing substituents dir ectly on the carbanion center. The ratios of E- and Z- isomeric units in the polymers were dependent on the structure of the nucleophiles us ed. Other carbanions with appropriate electron-withdrawing groups such as sulphones and ketones can be also used as a nucleophile for the pr esent polycondensation. Within heteronucleophiles examined, cyclic ami nes were suitable to produce polymers in high yields. (C) 1997 John Wi ley & Sons, Inc.