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Ideal iodonium: A method for the direct N-arylation of carbazoles and C-arylation of tetrahydrocarbazoles (substituted indoles) with diaryliodonium salts mediated by KOtBu in toluene has been developed. A range of arylated products were obtained in 50–92 %yield. The reaction has a wide scope and is tolerant of a broad range of functional groups.
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Guo et al. (2012) studied this question.
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