What is it about?
Certain carboxylic acids undergo a previously unknown photoredox reaction when irradiated with UVA in the presence of maleimide. Maleimide was found to synergistically act as a radical generating photoxidant and as a radical acceptor. Modest to excellent yields of ring-closed products chromenopyrroledione, thiochromenopyrroledione and pyrroloquinolinedione derivatives were obtained in thirteen preparative photolyses.
Why is it important?
A simple and clean way of making pyrroledione and quinolinediones is described.
The following have contributed to this page: Professor John C. Walton
In partnership with: