Asymmetric Ring Opening of Benzo‐7‐oxabicyclo[2.2.1]heptadienes with
<i>Cationic</i>
Rhodium Complexes
作者:Angelika Preetz、Christina Kohrt、Hans‐Joachim Drexler、Antoni Torrens、Helmut Buschmann、Monica Garcia Lopez、Detlef Heller
DOI:10.1002/adsc.201000236
日期:2010.10.9
very important reaction in the chemistry of CC and CX bond formation. By using the hitherto applied in situ technique for the generation of the μ2-bridged, dimeric neutral rhodium complexes, however, the catalytically active species and its concentration remained unidentified. Furthermore, the reaction temperature is at least 80 °C. The application of cationic rhodium(I) solvate complexes (that no longer
通过杂环双环烯烃的开环来有效设计立体化学挑战性的环系统,已成为CC和CX键形成化学中非常重要的反应。通过使用迄今施加原位技术用于产生μ 2桥联的二聚体中性铑配合物,但是,催化活性物质及其浓度仍然不确定。此外,反应温度为至少80℃。阳离子铑(I)溶剂化物配合物(不再包含嵌段二烯烃)的应用表明,合成1,2-二氢-1-萘酚的活性和对映选择性比迄今为止描述的要高得多,甚至在环境温度。NMR光谱和X射线分析表明,在开环反应过程中发生的产物抑制作用与亲核试剂无关。