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Title
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An efficient, mild and selective Ullmann-type N-arylation of indoles catalysed by Pd immobilized on amidoxime-functionalized mesoporous SBA-15 as heterogeneous and recyclable nanocatalyst
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Type
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JournalPaper
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Keywords
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SBA-15/AO/Pd(0); Ullmann coupling; indole; C–N bond formation
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Abstract
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A wide range of N-arylated indoles were selectively synthesized through intermolecular C(aryl)–N bond formation from the corresponding aryl iodides and indoles through Ullmann-type coupling reactions in the presence of a catalytic amount of Pd immobilized on amidoxime-functionalized mesoporous SBA-15 (SBA-15/AO/Pd(0)) under mild reaction conditions. These crosscoupled products were obtained in excellent yields under mild conditions at extremely low palladium loading (ca 0.3mol%), and the heterogeneous catalyst can be readily recovered by simple filtration and reused seven times with loss in its activity.
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Researchers
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Ramin Ghorbani-Vaghei (First Researcher), Hojat veisi (Fourth Researcher), Mona Hamelian (Third Researcher), Saba Hemmati (Second Researcher)
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