Aryl Grignard reagents were found to undergo coupling with aryl or alkenyl bromides in the presence of LiCl in a mixed solvent consisting of toluene and THF (2/1). Previously employed removal of THF with evacuation from Grignard solutions is no longer needed to obtain biaryls and styrene derivatives.
Game, SET, and match: Aryl Grignard reagents undergo coupling with aryl halides when toluene is used as a solvent in combination with a small amount of tetrahydrofuran (see scheme). The reaction proceeds through an SRN1 mechanism, and does not require any transition metal catalysts.
A highly water-dispersible/magnetically separable palladium catalyst based on a Fe3O4@SiO2 anchored TEG-imidazolium ionic liquid for the Suzuki–Miyaura coupling reaction in water
作者:Babak Karimi、Fariborz Mansouri、Hojatollah Vali
DOI:10.1039/c3gc42311e
日期:——
A novelionicliquidfunctionalizedmagnetic nanoparticle was prepared by anchoring an imidazolium ionicliquid bearing triethylene glycol moieties on the surface of silica-coated iron oxide nanoparticles. The material proved to be an effective host for the immobilization of a Pd catalyst through a subsequent simple ion-exchange process giving a highly water dispersible, active and yet magnetically
A Study on Applications of <i>N</i>-Substituted Main-Chain NHC-Palladium Polymers as Recyclable Self-Supported Catalysts for the Suzuki–Miyaura Coupling of Aryl Chlorides in Water
作者:Babak Karimi、Pari Fadavi Akhavan
DOI:10.1021/ic2000766
日期:2011.7.4
more lipophilic group n-dodecyl was found to be a more reactive and recoverable catalytic system in the Suzuki–Miyaura cross-coupling reaction of chloroarenes, including both deactivated and hindered aryl chlorides with different types of arylboronicacidsunder aqueous conditions. While the catalysts seem to be highly recyclable, on the contrary, we have provided much compelling evidence, such as
A novel water-soluble NHC-Pd polymer: an efficient and recyclable catalyst for the Suzuki coupling of aryl chlorides in water at room temperature
作者:Babak Karimi、Pari Fadavi Akhavan
DOI:10.1039/c1cc00017a
日期:——
A novel water-soluble NHC-Pd polymer with triethylene glycol legs was developed as a water soluble and highly recyclablecatalyst that shows high catalytic activity in the Suzuki-Miyaura coupling of aryl chlorides in high yields in water at roomtemperature.