A palladium‐catalyzed dearomatizing difunctionalization of N ‐Boc‐indoles and benzofurans to give tricyclic indolines and 2,3‐dihydrobenzofurans with a fully substituted carbon center is described. Product formation occurs under mild conditions at room temperature with commercially available aryl boronic acids and 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) as a mild oxidant in good yields.
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Ramella et al. (2016) studied this question.
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