Hydrochloric Acid → Amino-5-phenyl-7-bis (2 cyanoethyl)amino phenazinium chloride

Participants

Reaction Conditions

Reaction Steps

A 3-liter round-bottomed flask fitted with a mechanical stirrer was loaded with 16.6 g (0.066 mole) of 4-(bis-(2-cyanoethyl)amino) aniline in 800 ml of distilled water. A 10% excess of aniline (13.56 g, 0.1456 mole) and 200 ml of distilled water were added to the mixture. The mixture was cooled to 0° C. in an ice bath, and 10 g concentrated hydrochloric acid in 25 ml of water were added. Then 6.31 g (0.0883 mole) of sodium dichromate in 25 ml of water was added. The temperature rose to 7° C. Stirring was continued as 9 ml of concentrated hydrochloric acid in 25 ml of distilled water was added over a period of two hours. After 16 hours the temperature had risen to 20° C. The mixture was heated under reflux for 4 hours and then filtered hot. The filter cake was washed with 1.5 liters of boiling water. The combined filtrates were concentrated to 1.4 liters and then heated to 75° C. as 200 g of sodium chloride were added.

Provenance & Evidence