Hydrochloric Acid → 5-Bromo-3-(5-phenyl-1,3,4-thiadiazol-2-yl)pyrazin-2-amine

Participants

Reaction Steps

Methyl 2-((phenylcarbonothioyl)thio)acetate (3.6 g, 15.9 mmol) and 3-amino-6-bromopyrazine-2-carbohydrazide (2.9 g, 12.5 mmol) were suspended in 200 mL of ethanol and refluxed for 2 days. To the mixture, 50 mL of sat. ethanolic HCl was added and the mixture was refluxed overnight. A precipitate formed. The formed solid was filtered and dried to afford 5-Bromo-3-(5-phenyl-1,3,4-thiadiazol-2-yl)pyrazin-2-amine 5 (1.5 g, 36%).

Provenance & Evidence