| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1307366 | Inorganica Chimica Acta | 2008 | 9 Pages |
One previously known and three novel quinolinyl phosphanes were synthesized by either a reaction between a lithiated diphenylphosphane and the appropriate chloroquinoline or by a reaction between a lithiated haloquinoline and an arylchlorophosphane. The reaction of the quinolinyl phenylphosphane ligands with PdCl2(cod) produced monomeric palladium complexes in diethyl ether and dimeric, chlorine-bridged complexes in dichloromethane. Crystal structures of the palladium complexes confirm that the quinolinyl phenylphosphanes do not form chelated structures while bonded to the metal centre. 2-Quinolinyl(diphenyl)phosphane has a tendency to form a cis-isomer while bonded to the metal centre in the mononuclear complex due to attractive interactions between two ligands. A catalytic study showed that the quinolinyl phenylphosphane ligands are moderately active in the Suzuki–Miyaura coupling of various aryl halides in air.
Graphical abstractA series of quinolinyl phenylphosphane ligands and their mono- and dinuclear palladium complexes have been prepared, characterized and screened as potential catalysts. The picture shows a cis-isomer of the mononuclear palladium complex of 2-quinolinyldiphenylphosphane, revealing an offset π-stacking interaction between the quinolinyl and phenyl moieties.Figure optionsDownload full-size imageDownload as PowerPoint slide
