抄録
Cinnoline 2-oxide (I) gave 5-, 6-and 8-nitrocinnoline 2-oxides (II, III, and IV) on warming with nitric and sulfuric acids or potassium nitrate in sulfuric acid. The nitration of I with benzoyl nitrate afforded II. 5-, 6- and 8-Aminocinnolines (V, VI, VII), 6-and 8-aminocinnoline 2-oxides (VIII and IX), and 5-aminodihydrocinnoline (X) were synthesized for the determination of the structures of II, III and IV. The effect of 2-N-oxide of I in this reaction was affected by the concentration of sulfuric acid and the reaction temperature.
