合成了具有空间扩大的N-杂环卡宾配体的铵标记的霍维达型催化剂,并将其负载在SBA-15上。所获得的非均相烯烃复分解催化剂形成了前所未有的稳定的Ru-亚甲基,并提供了闭环和交叉复分解的产物,其周转数(TON)高达35 000,周转频率(TOFs)高达1590 min –1。事实证明该催化剂是真正可回收的,并且在连续流模式下有效。
Disclosed herein is a general method for the preparation of complexes containing a quaternary onium group in an inert ligand. Some of these complexes may be represented by formula 1:
Methods for the preparation of complexes of formula 1, the preparation of intermediates and the use of complexes of formula 1 in metathesis reactions and a method for conducting an olefin metathesis reaction are also described.