Synthesis of Telechelic Olefin Polymers via Catalyzed Chain Growth on Multinuclear Alkylene Zinc Compounds
2013; American Chemical Society; Volume: 135; Issue: 22 Linguagem: Inglês
10.1021/ja403626g
ISSN1943-2984
AutoresHaruyuki Makio, Takashi Ochiai, Jun‐ichi Mohri, Kouji Takeda, Toshiyuki Shimazaki, Yoko Usui, Sadahiko Matsuura, Terunori Fujita,
Tópico(s)Synthetic Organic Chemistry Methods
ResumoMultinuclear alkylene zinc (MAZ) compounds of the type EtZn-(R″-Zn)n-Et (R″ = ethyl and propyl branched alkylene groups) were synthesized by a simple one-step procedure in nonpolar hydrocarbon solvents from α,ω-dienes (e.g., 1,7-octadiene or 1,9-decadiene) and diethylzinc using a bis(salicylaldiminato)Zr(IV) complex, [(2-methylcyclohexyl)N═CH(2-O-C6H3-3,5-di-tert-butyl)]2ZrMe2, as a catalyst. The MAZ serves as a divalent reversible chain-transfer agent for olefin polymerization, resulting in telechelic Zn-metalated polyolefins whose molecular weights are controllable over a wide range. The Zn-terminated telechelics serve as a polymer precursor for further reactions and can be converted into a variety of telechelic functionalized polyolefins in high yield.
Referência(s)