Cl <sub>3</sub> Al‐PH <sub>3</sub> Is a Weak Lewis Pair Allowing the Synthesis of Sterically Highly Hindered Primary and Secondary Alkyl Phosphanes
Abstract
Abstract Phosphane (PH 3 ) gas has the highest phosphorus content of all commercial phosphorus compounds, yet its use for valuable chemicals is very limited. Aluminum chloride and phosphane yield quantitatively the adduct Cl 3 Al‐PH 3 , which is easy to handle and reacts with a large set of alkyl halides to give phosphonium salts that can be converted to primary phosphanes. This sequence has been generalized to access various secondary and some tertiary phosphanes in excellent yields under mild conditions and short reaction times. With unprecedented ease, these reactions allow, in particular, the preparation of sterically demanding phosphanes, which, as ligands, are key components of highly catalytically competent transition metal complexes.
Article Details
Authors (8)
Jan Oswald
Department of Chemistry and Applied Biosciences ETH Zürich Vladimir‐Prelog‐Weg 1–5/10 Zürich 8093 Switzerland
Csilla Fekete
Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 Budapest 1111 Hungary
Matt Baker
Mark Bispinghoff
Department of Chemistry and Applied Biosciences ETH Zürich Vladimir‐Prelog‐Weg 1–5/10 Zürich 8093 Switzerland
Paul G. Pringle
School of Chemistry University of Bristol Bristol BS81TS UK
Norbert Weferling
WefConsult GmbH 50354 Hürth Germany
Zoltán Benkő
Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 Budapest 1111 Hungary
Hansjörg Grützmacher
Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, Zürich CH-8093, Switzerland