Eosin Y‐catalyzed reductive homocoupling of para‐quinone methides under visible‐light.

In this manuscript, we demonstrate a visible‐light driven dimerization of para‐quinone methides using eosin Y catalyst via a reductive homocoupling process. This mild and operationally simple methodology was found to be compatible with a variety of differently substituted para‐quinone methides and a broad range of tetra‐arylethane derivatives were obtained in moderate to good yields (47%–87%). [ABSTRACT FROM AUTHOR]