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.
Sun et al. (2026) studied this question.