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 oxidativecoupling. 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)
Polyfluorinated phosphine ligands in the room temperature Suzuki cross-coupling reactions
作者:Shahla Yekta、Lawrence Cheung、Andrei K. Yudin
DOI:10.1016/j.tetlet.2007.09.016
日期:2007.11
Polyfluorinated phosphine ligands can be obtained by regioselective nucleophilic aromatic substitution on tetrafluoro-naphthalene derivatives. The ligand effciency has been demonstrated in the room temperature Suzuki coupling reactions of aryl bromides and aryl boronic acids. The described process allows access to a new class of highly versatile fluorinated phosphine ligands. (C) 2007 Elsevier Ltd. All rights reserved.