Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States.
J Am Chem Soc. 2011 Apr 20;133(15):5794-7. doi: 10.1021/ja201644v. Epub 2011 Mar 29.
3-Substituted cis-cyclooctenes (3RCOEs, R = methyl, ethyl, hexyl, and phenyl) were synthesized and polymerized, and the polymers therefrom were hydrogenated to prepare model linear low density polyethylene (LLDPE) samples. The ring-opening metathesis polymerization (ROMP) of the 3RCOEs using Grubbs' catalyst proceeded in a regio- and stereoselective manner to afford polyoctenamers [poly(3RCOE)] exhibiting remarkably high head-to-tail regioregularity and high trans-stereoregularity. The overall selectivity increases with the increasing size of the R substituent. Hydrogenation of poly(3RCOE)s afforded precision LLDPEs with R substituents on every eighth backbone carbon.
3-取代顺式环辛烯（3RCOEs，R=甲基、乙基、己基和苯基）被合成并聚合，然后将聚合物氢化以制备模型线性低密度聚乙烯（LLDPE）样品。使用 Grubbs 催化剂的 3RCOEs 的开环复分解聚合（ROMP）以区域和立体选择性的方式进行，得到具有显著高的头-尾区域规整度和高反式立体规整度的聚辛烯[聚（3RCOE）]。整体选择性随 R 取代基的增大而增加。聚（3RCOE）的氢化得到了在每个第八个主链碳上带有 R 取代基的精密 LLDPE。
Zotero 插件