Ligand-Free Palladium-Catalyzed Direct Arylation of Thiazoles at Low Catalyst Loadings
Julien Roger, Franc Pogan and Henri Doucet*
*Institut Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes “Catalyse et Organometalliques”, Campus de Beaulieu, 35042 Rennes, France, Email: henri.doucetuniv-rennes1.fr
J. Roger, F. Pogan, H. Doucet, J. Org. Chem., 2009, 74, 1179-1186.
Ligand-free Pd(OAc)2 catalyzes very efficiently the direct arylation of thiazole derivatives under very low catalyst concentration. Reactions with activated aryl bromides can be performed employing as little as 0.1-0.001 mol % catalyst, whereas some strongly deactivated or highly congested aryl bromides only give disappointing results.
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