Palladium-Catalyzed Intramolecular Sulfonamidation/Oxidation of Imines: Access to Multifunctional Benzimidazoles
作者:Shaomin Fu、Huanfeng Jiang、Yuanfu Deng、Wei Zeng
DOI:10.1002/adsc.201100370
日期:2011.10
O-Sulfonamidophenylimines undergo intramolecular sulfonamidation/oxidation to produce 1,2-disubstituted benzimidazoles upon treatment with palladium(II) chloride/(diacetoxyiodo)benzene and potassium carbonate at room temperature. The substituent scope at the 2-position of the benzimidazole can be extended to alkyl, aryl, alkenyl, acyl, and ester functional groups under mild conditions.
在室温下用氯化钯(II)/(二乙酰氧基碘)苯和碳酸钾处理后,O-磺酰胺基苯亚胺进行分子内磺酰胺化/氧化,以生成1,2-二取代的苯并咪唑。在温和条件下,苯并咪唑2位的取代基范围可以扩展到烷基,芳基,烯基,酰基和酯官能团。