New strategy for the synthesis of N-aryl pyrroles: Cu-catalyzed C–N cross-coupling reaction of trans-4-hydroxy-l-proline with aryl halides
作者:V. Prakash Reddy、A. Vijay Kumar、K. Rama Rao
DOI:10.1016/j.tetlet.2010.12.016
日期:2011.2
trans-4-Hydroxy-L-proline is used for the first time as an effective nucleophilic coupling partner with aryl halides mediated by copper iodide with Cs(2)CO(3) as the base and DMSO as the solvent. Utilizing this protocol cross-coupling of trans-4-hydroxy-L-proline with a wide variety of substituted aryl halides to produce N-aryl pyrroles in moderate to good yields. (C) 2010 Elsevier Ltd. All rights reserved.
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.