Coordinating Anions: (Phosphino)tetraphenylborate Ligands as New Reagents for Synthesis
journal contributionposted on 12.01.2004 by Christine M. Thomas, Jonas C. Peters
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Anionic, electron-releasing phosphines that incorporate a borate counteranion within the ligand framework are promising reagents for organometallic catalysis. This report describes the synthesis of a new class of monodentate tertiary phosphines built upon the commonly employed tetraphenylborate anion. These new phosphines are highly stable and strongly electron-releasing and readily coordinate transition metals. Moreover, they are promising reagents for catalysis, as demonstrated by their ability to promote the Suzuki cross-coupling of aryl chloride substrates.