Abstract
Herein, we demonstrate a redox-neutral, operationally simple, atom-economical, and additive-free approach for the synthesis of indolyl diarylmethanes via a radical reaction of indoles with para-quinone methides (p-QMs) under visible-light mediated reaction conditions using eosin Y as an organophotoredox catalyst. This protocol was found to be compatible with a wide range of differently substituted p-QMs and indoles in organic as well as in aqueous media under visible-light irradiation, furnishing the desired products in good to excellent yields.
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