Palladium-Catalyzed Direct Arylation of Thiophenes Bearing SO2R Substituents
摘要:
The palladium-catalyzed direct arylation of SO2R-substituted thiophene derivatives was found to proceed regioselectively at CS and in high yields using a variety of aryl bromides and as low as 0.5-0.1 mol % of phosphine-free Pd(OAc)(2) as the catalyst. For these reactions, sulfonyls, sulfonamides, or even a sulfonic ester as the thiophene substituents were successfully employed.
Palladium-Catalyzed Direct Arylation of Thiophenes Bearing SO<sub>2</sub>R Substituents
作者:Charles Beromeo Bheeter、Jitendra K. Bera、Henri Doucet
DOI:10.1021/jo200918n
日期:2011.8.5
The palladium-catalyzed direct arylation of SO2R-substituted thiophene derivatives was found to proceed regioselectively at CS and in high yields using a variety of aryl bromides and as low as 0.5-0.1 mol % of phosphine-free Pd(OAc)(2) as the catalyst. For these reactions, sulfonyls, sulfonamides, or even a sulfonic ester as the thiophene substituents were successfully employed.