2- Amino-l,4-naphthoquinones

From 1,4- or 1,2-naphthoquinones, however, good yields of 2-amino-l,4-naphthoquinone and 4-amino-l,2-naphthoquinone, respectively, are obtained when glacial acetic acid serves as solvent and 1.7 equivalents of sodium azide is added. 3-Bromo-l,2-naphthoquinone yields 3-bromo-... 

---