A transition metal‐free cross‐electrophile coupling of isatins with acceptor‐substituted alkene has been developed. The reaction operates at room temperature utilizing abundant amine as the terminal reductant under visible light irradiation. A large number of γ‐hydroxy esters and γ‐butyrolactones were synthesized in moderate to good yields tolerating a broad range of functional groups.
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Maji et al. (2021) studied this question.