反应详情

温度

50 °C

A mixture of aminoguanidine hydrochloride (3.18 g, 29 mmol), 1-cyclopropyl-4-isothiocyanato-naphthalene (3.24 g, 14 mmol) and diisopropylethylamine (3 eq) in DMF (20 mL) was stirred at 50° C. for 15 hours. The solvent was evaporated, toluene was added, and the solvent was evaporated again. A 2.0 M aqueous solution of sodium hydroxide (30 mL) was added and the reaction mixture was heated at 50° C. for 60 hours. The reaction mixture was filtered, and the filtrate was neutralized with a 2.0 M aqueous solution of HCl. New filtration, then evaporation of solvent and purification of the residue by silica gel chromatography to yield 5-amino-4-(4-cyclopropylnaphthalen-1-yl)-4H-[1,2,4]triazole-3-thiol (2.0 g, 49%).

1. customThe solvent was evaporated
2. additiontoluene was added
3. customthe solvent was evaporated again
4. additionA 2.0 M aqueous solution of sodium hydroxide (30 mL) was added
5. temperaturethe reaction mixture was heated at 50° C. for 60 hours
6. filtrationThe reaction mixture was filtered
7. filtrationNew filtration
8. customevaporation of solvent and purification of the residue by silica gel chromatography