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Alkynyl indoles undergo a novel sequence of Pd-catalysed indole C-H activation/alkyne carbopalladation/arylation, with diaryliodonium salts providing the aryl components. An array of functionalised indole alkenes have been prepared in good to excellent yield, with the reaction being selective for the Z-alkene.
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López-Suárez et al. (2011) studied this question.
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