| Abstract: | The nitration of 5H-phenanthridin-6-one (I), 5H-phenanthridin-6-one-10-carboxylic (II) and 5H-phenanthridin-6-one-1-carboxylic acids (III), 4H-cyclopentak,l,m]-phenanthridine-5,9-dione (IV), 4H-cyclopentak,l,m]phenanthridine-5-one (V), 5,10-dioxo-4,5,9,10-tetrahydro-4,9-diazapyrene (VI), and 5,9-dioxo-4,5,9,10-tetrahydro-4,10-diazapyrene (VII) with nitric acid (sp. gr. 1.42–1.51) and a nitrating mixture of 0–120 °C was investigated. The orientation and sequence of incorporation of nitro groups in I-VII are determined by the presence of a phenanthridone structure in them. Mono-, di-, tri-, and tetranitro-substituted I-VII were obtained and characterized.See l] for Communication 2.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 388–393, March, 1981. |
