Synthesis of Chiral Bis-MOP-type Diphosphines. Chelating Effect in Nickel-catalyzed Phosphination

Chiral bis-MOP-type diphosphines with alkyl and pyridyl bridges connecting the two binaphthyl units have been synthesized via [NiCl2(dppe)]-assisted phosphination of the corresponding aryl triflates. The effect of the amount of the nickel complex on the reaction yield was investigated. Catalytic and...

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Bibliographic Details
Published in:Chemistry letters 2013-01, Vol.42 (1), p.37-39
Main Authors: Abreu, Artur R, Peixoto, Andreia F, Almeida, Ana R, Lourenco, Mirtha AO, Neves, Angela CB, Bayon, JCarles, Pereira, Mariette M
Format: Article
Language:English
Subjects:
Aromatic compounds
Bridges (structures)
Catalysis
Catalysts
Chelating
Joining
Nickel
Synthesis
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Summary:Chiral bis-MOP-type diphosphines with alkyl and pyridyl bridges connecting the two binaphthyl units have been synthesized via [NiCl2(dppe)]-assisted phosphination of the corresponding aryl triflates. The effect of the amount of the nickel complex on the reaction yield was investigated. Catalytic and even stoichiometric amounts of the complex proved to be insufficient to promote an efficient phosphination, but the use of an excess of the metal complex provides good yields.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2013.37