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 intramolecularsulfonamidation/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.