Palladium-Catalyzed Direct Arylation of Pyrazole Derivatives: A Green Access to 4-Arylpyrazoles
作者:Henri Doucet、Maurice Santelli、Yacoub Fall
DOI:10.1055/s-0029-1217075
日期:2010.1
1,3,5-Trisubstituted pyrazoles were found to be suitable partners for palladium-catalyzed directarylation via C-H activation/functionalization using aryl bromides. The reaction conditions and the catalyst have a determining influence on the yields. The systemusing palladium(II) acetate as the catalyst, potassium acetate as the base, and N,N-dimethylacetamide as the solvent promotes selective 4-arylations