A photocatalytic decarboxylative functionalization of cyclopropenes is reported. Starting from a broad range of redox‐active ester‐substituted cyclopropenes, cyclopropenylphthalimides can be synthesized in the absence of a nucleophile. Alternatively, different carbon and heteroatom nucleophiles can be introduced. The transformation proceeds most probably through the formation of an aromatic cyclopropenium cation, followed by trapping with the nucleophiles.
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Smyrnov et al. (2024) studied this question.
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