Synthesis and properties of 1,4-dihydropyrrolo(3,2-b)pyrrole-2,5-dione derivatives.
A new approach to 1,4-dihydropyrrolo[3,2-b]pyrrole-2,5-dione derivatives, which are regarded to belong to an interesting redox system, is described. Reduction potentials along with chemical and spectral properties of these derivatives are presented, and the capability as electron acceptors is also discussed.