POLY(1,1'-BI-2-NAPHTHOL)S - SYNTHESIS, CHARACTERIZATION, AND APPLICATION IN LEWIS-ACID CATALYSIS

6,6'-Dibromo-1,1'-bi-2-naphthol derivatives, where the hydroxyl groups are protected by alkyl, methoxymethyl, and acyl groups, have been pol ymerized using nickel(0) or nickel(II) complexes as catalysts. The mol ecular weights of the resulting polymers have been analyzed by gel per meation chromatography and laser light scattering. Hydrolysis of these polymers has produced the optically active poly(1,1'-bi-2-naphthol)s [poly(BINOL)s]. The poly(BINOL)s are soluble in basic water solution a nd have been characterized by NMR, IR, UV, and CD spectroscopic method s. The reaction of a (R)-poly(BINOL) with diethylaluminum chloride, tr imethylaluminum, and titanium tetraisopropoxide generates novel polyme ric Lewis acid complexes. These complexes represent a new generation o f polymeric catalysts where the catalytic centers are highly organized in an optically active and sterically regular polymer chain. When use d to catalyze the Mukaiyama aldol condensation, the polymeric aluminum catalyst shows greatly enhanced catalytic activity over the monomeric complex.