Preparation and catalytic applications of partially fluorinated binaphthol ligands
作者:Shahla Yekta、Larissa B Krasnova、Brian Mariampillai、Christine J Picard、Gang Chen、Subramanian Pandiaraju、Andrei K Yudin
DOI:10.1016/j.jfluchem.2003.11.024
日期:2004.4
New partially fluorinated binaphthols were obtained using a copper-catalyzed oxidative coupling. The corresponding enantiomerically pure compounds were prepared by fractional crystallization of the corresponding bis(menthyl)carbamates. Nucleophilic aromatic substitution using oxygen- and carbon-based nucleophiles resulted in functionalized derivatives without concomitant racemization. The titanium(IV)
使用铜催化的氧化偶合获得了新的部分氟化的联萘酚。通过分步结晶相应的双(薄荷基)氨基甲酸酯来制备相应的对映体纯的化合物。使用基于氧和碳的亲核试剂进行亲核芳香族取代,可得到功能化的衍生物,而不会伴随外消旋作用。这些配体的钛(IV)络合物在硫化物的不对称氧化中具有催化活性。