A visible‐light‐promoted chemodivergent phosphorylation‐peroxidation and oxyphosphorylation of alkenes with phosphine oxides and HOO t Bu was realized under transition‐metal‐free conditions. Using the commercially available Eosin Y as a SET‐photocatalyst, the β ‐peroxy‐phosphine oxides were selectively obtained with a catalytic amount of base, while the addition of acid led to the exclusive formation of β ‐keto‐phosphine oxides control experiments showed that Eosin Y could also act as a HAT‐catalyst to induce the O−O bond cleavage of peroxides under acidic conditions.
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Pan et al. (2024) studied this question.
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