A convenient approach for synthesizing indole‐ N ‐carboxamide derivatives through palladium‐catalyzed isocyanide insertion into the N−H bond of 3‐(phenylhydrazono)oxindoles has been developed. The inclusion of the 3‐phenylhydrazone group proved essential in remotely activating the N−H bond of the oxindole. Also, it has been established that the reaction outcome is highly dependent on the electronic effects of the substituents.
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Soam et al. (2024) studied this question.
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