The invention is directed to ruthenium-based metathesis catalysts of the Grubbs-Hoveyda type. The new 2-aryloxy-substituted ruthenium catalysts described herein reveal rapid initiation behavior. Further, the corresponding styrene-based precursor compounds are disclosed. The catalysts are prepared in a cross-metathesis reaction starting from styrene-based precursors which can be prepared in a cost-effective manner.
The new Grubbs-Hoveyda type catalysts are suitable to catalyze ring-closing metathesis (RCM), cross metathesis (CM) and ring-opening metathesis polymerization (ROMP). Low catalyst loadings are necessary to convert a wide range of substrates including more complex and critical substrates via metathesis reactions at low to moderate temperatures in high yields within short reaction times.
该发明涉及格鲁布斯-霍维达类型的基于
钌的交换催化剂。本文描述的新型2-芳氧基取代的
钌催化剂展现出快速的起始行为。此外,还披露了相应的基于
苯乙烯的前体化合物。这些催化剂是通过从基于
苯乙烯的前体物开始的交叉交换反应制备的,这种方法可以以成本效益的方式进行。新的格鲁布斯-霍维达类型催化剂适用于催化环闭合交换反应(RCM)、交叉交换反应(CM)和环开启交换聚合反应(ROMP)。在低至中温度下,通过交换反应以低催化剂负载量转化各种底物,包括更复杂和关键的底物,可以在短时间内高产率地完成。