9,10-Phenanthrenedione → 10-(3,6-Dimethyl-2-pyrazinylazo)-9-phenanthrol

Participants

Reaction Conditions

Reaction Steps

Next, a reaction flask was loaded with acetic acid (80 ml) and 9,10-phenanthrenequinone (4.0 g), and heated up to 90° C. with stirring to dissolve 9,10-phenanthrenequinone. To the resultant, the crystals of 2-hydrazino-3,6-dimethylpyrazine (2.7 g) was added in 20 minutes. After stirring at 90 to 100° C. for two hours, the reaction mixture was cooled and filtrated. An aqueous solution of sodium hydroxide was added to the filtrate with stirring so that crystals precipitated. The crystals were filtrated and washed with methanol, followed by being recrystallized with dioxane-water. The crystals were then filtrated and dried to give intended crystals (3.3 g).

Provenance & Evidence