o-Nitroaniline derivatives. Part 14.1,2 Cyclisations leading to benzimidazole N-oxides, N-hydroxybenzimidazolones and N-hydroxyquinoxaline-2,3-diones: a mechanistic borderline
o-Nitroaniline derivatives. Part 14.1,2 Cyclisations leading to benzimidazole N-oxides, N-hydroxybenzimidazolones and N-hydroxyquinoxaline-2,3-diones: a mechanistic borderline