11.8 g of 2-aminothiophenol, 10 ml of acetic acid and 6.3 g of malononitrile in 90 mL of ethanol are combined in a flask. The mixture is stirred for 10 h at 30°C. The precipitate is then filtered and recrystallized from hot methanol.
The mixture after a few hours
The mixture after completion
Filtration of the crude product
The recrystallized product