On the reactivity of benzo[a]phenazine-5,6-dione 7-oxides with methanolic alkali and pyrrolidine

When treated with methanolic alkali, benzo[а]phenazine-5,6-dione 7-oxides convert into 11Н-indeno[1,2-b]quinoxalin-11-ones, whereas 11-hydroxy-11-(pyrrolidine-1-carbonyl)-11Н-indeno[1,2-b]quinoxaline 10-oxides form upon treatment with pyrrolidine.