Highly Efficient Route to <i>o</i>-Allylbiaryls via Palladium-Catalyzed Three-Component Coupling of Benzynes, Allylic Halides, and Aryl Organometallic Reagents
[reaction: see text] o-Allylbiaryl derivatives have been prepared in good to excellent yields by the palladium-catalyzed three-component reaction of allyl halides, benzynes, and aryl organometallic reagents.
A N-heterocyclic tetracarbene Pd(<scp>ii</scp>) moiety containing a Pd(<scp>ii</scp>)–Pb(<scp>ii</scp>) bimetallic MOF for three-component cyclotrimerization via benzyne
A N-heterocyclic tetracarbene Pd(ii) moiety containing a bimetallic metal–organic framework Pd(ii)–Pb(ii)–MOF, which can be a highly active heterogeneous catalyst for three-component cyclotrimerization, is reported.
The palladium-catalyzed allylation of aryl halides with homoallyl alcohols via retro-allylation proceeds at 200-250 degrees C in a toluene-DMF mixed solvent using microwave heating. Even at such high temperatures, the regio- and stereospecificity of the allyl transfer reaction is still satisfactory. The amount of the palladium catalyst can be reduced to 0.5 or 0.05 mol %. (c) 2007 Elsevier Ltd. All rights reserved.