Ringing the changes for organopalladium catalysts. A new nucleophilic reactivity of organopalladium species has been revealed. The reaction between aryl isocyanates and terminal alkynes in the presence of a palladium catalyst produces oxindoles through the intramolecular vinylpalladation of isocyanates (see scheme; dppe=1,2-bis(diphenylphosphanyl)ethane).
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Kamijo et al. (2005) studied this question.
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