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A method shows moderate to good yields of allenylamides in alkynes, suggesting new ways to control reactions.
A method for the asymmetric allenylation of simple alkynes is described using chiral diselenide catalysts. Trisubstituted allenylamides were obtained in moderate to good yields with enantiomeric excesses up to 72%. Our results feature a stereodivergency of the reaction mechanism depending on the nature of the base and the temperature, which impacts the precise control of the β‐H elimination of the transient alkenylselenanes species.
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Sun et al. (2026) studied this question.
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