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Pd-catalyzed carboamination generates functionalized allenic amines in conjugated enynes, suggesting new heterocycle synthesis pathways.
We report a Pd‐catalyzed carboamination of conjugated enynes for the direct synthesis of functionalized allenic amines. The reaction proceeds through a selective 1,4‐coupling of anilines and aryl triflates with enynes, utilizing a free alcohol as a native directing group. The obtained allenes undergo versatile transformations, including cyclization to dihydropyrans, hydroamination, and tandem carboamination sequences. Notably, the use of primary anilines enables a second carboamination to generate multifunctionalized 3‐pyrroline heterocycles through dual C‐N bond formation with two distinct aryl triflates. The transformation represents a novel approach to allene synthesis and heterocycle construction through sequential carboamination events.
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Solé‐Àvila et al. (2026) studied this question.
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