Novel Amphoteric 2,5-Furoquinonoid-Containing p-Terphenoquinone Analogues Giving Both a Stable Radical Anion and a Stable Radical Cation

Article abstract of DOI:10.1246/cl.1994.863

Novel p-terphenoquinone analogues incorporating a central dihydrofurandiylidene skeleton have been synthesized.These quinones gave a stable radical kation and a stable radical anion on one-electron redox reactions showing an amphoteric property even though they do not contain any sulfur atom as an integral component.The radical cation and the radical anion of the tetra-t-butyl derivative have been characterized by EPR spectroscopy.