Hongfa Chayanant, Tian Jianhua, Bazzi Hassan S, Bergbreiter David E
Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, USA.
Org Lett. 2007 Aug 16;9(17):3259-61. doi: 10.1021/ol071210k. Epub 2007 Jul 20.
Terminally vinyl-functionalized polyisobutylene (PIB) oligomers can be easily transformed into end-functionalized PIB-bound Ru metathesis catalysts. The nonpolar catalysts so prepared can be used as solutions in heptane and recycled by a gravity-based extraction after addition of a heptane-immiscible polar solvent. This paper describes the synthesis and the recycling of a PIB-supported second-generation Hoveyda-Grubbs catalyst for Ru-catalyzed ring-closing metathesis and ring-opening metathesis polymerizations.
末端带有乙烯基官能团的聚异丁烯（PIB）低聚物可以很容易地转化为末端官能化的与PIB结合的钌复分解催化剂。如此制备的非极性催化剂可以以庚烷溶液的形式使用，并在加入与庚烷不混溶的极性溶剂后通过基于重力的萃取进行回收。本文描述了一种用于钌催化的闭环复分解和开环复分解聚合反应的PIB负载第二代霍维达-格鲁布斯催化剂的合成及回收。
