Pyridine-Stabilized Fast-Initiating Ruthenium Monothiolate Catalysts for <i>Z</i>-Selective Olefin Metathesis
作者:Giovanni Occhipinti、Karl W. Törnroos、Vidar R. Jensen
DOI:10.1021/acs.organomet.7b00441
日期:2017.9.11
Pyridine as a stabilizing donor ligand drastically improves the performance of ruthenium monothiolate catalysts for olefin metathesis in comparison with previous versions based on a stabilizing benzylidene ether ligand. The new pyridine-stabilized ruthenium alkylidenes undergo fast initiation and reach appreciable yields combined with moderate to high Z selectivity in self-metathesis of terminal olefins
与基于稳定的亚苄基醚配体的先前版本相比,作为稳定的供体配体的吡啶可显着提高单硫醇钌钌催化剂在烯烃复分解中的性能。新的吡啶稳定化钌烷基亚烷基在室温下仅需几分钟后,即可快速引发并达到可观的收率,并具有中等至高的Z选择性,可在终端烯烃的自我复分解中进行。而且,它们可以与包括酸在内的多种底物一起使用,并促进ω-链烯酸的自我复分解。吡啶稳定的单硫醇钌钌催化剂在大环闭环复分解反应的高底物稀释度和催化过程中能抵抗100°C以上的高温下也很有效。