Palladium-Catalyzed Cross-Coupling of Pyrrole Anions with Aryl Chlorides, Bromides, and Iodides
作者:Ryan D. Rieth、Neal P. Mankad、Elisa Calimano、Joseph P. Sadighi
DOI:10.1021/ol048367m
日期:2004.10.1
enyl ligands, (pyrrolyl)zinc chloride may be cross-coupled with a wide range of aryl halides, including aryl chlorides and arylbromides, at low catalyst loadings and under mild conditions. A high degree of steric hindrance is tolerated. Certain ring-substituted pyrrole anions have also been arylated with arylbromide substrates.
We developed a facile photoinduced disproportionation approach to generate radical anions of pyrrole derivatives for the reduction of aryl halides, as well as the formation of desired heterocyclic product without the addition of any photocatalysts.