Double Cyclopolymerization of Functionalized Trienes Catalyzed by Palladium Complexes

作者：Motokuni Kenya; Okada Takeshi; Takeuchi Daisuke; Osakada Kohtaro^*

来源：Macromolecules, 2011, 44(4): 751-756.

DOI：10.1021/ma1022204

Pd-diimine complexes catalyze polymerization of 1,6,11-dodecatrienes having cyclic ester groups at the 4 and 9 positions to produce the polymers containing two trans-five-membered rings in the structural units. The doublecyclopolymerization of triene with cyclic acetal group yields the polymer with narrow molecular weight distribution (M(w)/M(n) = 1.20-1.66). The two five-membered rings in a monomer unit of these polymers are linked directly with racemo stereochemistry. Relative stereochemistry of the monomer units separated by ethylene spacer changes depending on the monomer and catalyst, and 91% syndioselectivity is obtained in the polymerization of the triene with cyclic acetal groups. Hydrolysis of the polymer containing cyclic acetal groups yields the polymer containing CH(2)OH groups.

• 出版日期2011-2-22