A Magnetically Separable Heterogeneous Deallylation Catalyst: [CpRu(η<sup>3</sup>-C<sub>3</sub>H<sub>5</sub>)(2-pyridinecarboxylato)]PF<sub>6</sub>Complex Supported on a Ferromagnetic Microsize Particle Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>
作者:Takuya Hirakawa、Shinji Tanaka、Naoki Usuki、Hisao Kanzaki、Mikio Kishimoto、Masato Kitamura
DOI:10.1002/ejoc.200801166
日期:2009.2
The highly reactive and chemoselective homogeneousdeallylation catalyst CpRu(η3-C3H5)(4-substituted-2-pyridinecarboxylato) was immobilized on microsize spherical Fe3O4@SiO2 particles. The resultant heterogeneous catalyst displays high saturation magnetization, weak coercive forces and high levels of dispersibility. The catalyst has increased the utility of deallylation by allowing the reaction to be
将高反应性和化学选择性的均相脱烯丙基化催化剂 CpRu(η3-C3H5)(4-取代-2-吡啶羧基) 固定在微型球形 Fe3O4@SiO2 颗粒上。所得多相催化剂显示出高饱和磁化强度、弱矫顽力和高水平分散性。通过允许在没有额外添加剂的情况下进行反应,该催化剂增加了脱烯丙基化的效用。该反应的唯一副产物是挥发性烯丙基醚化合物。在这里,我们展示了高极性多功能化合物的有效去烯丙基化和分离以及多轮催化剂回收,而不会显着降低反应性。这种催化剂的有用性已通过三核糖核苷酸 3-5 U 的合成得到证实。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim,