N'-Hydroxy-4-(trifluoromethyl)benzene-1-carboximidamide → HCID 86684874, compound

Participants

Reaction Steps

N′-hydroxy-4-(trifluoromethyl)benzene carboximidamide (450 mg) was added to a tetrahydrofuran (8.8 mL) suspension that contained 1-methyl-1H-pyrazol-5-carboxylic acid (450 mg), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (465 mg) and 1-hydroxybenzotriazole monohydrate (328 mg) at a room temperature, and the obtained solution was then stirred for 16 hours. Thereafter, potassium tert-butoxide (1.11 g) and tetrahydrofuran (4.4 mL) were added to the reaction solution, and the obtained mixture was then stirred at a room temperature for 3 hours. Thereafter, water was added to the reaction solution, and the obtained mixture was then extracted with ethyl acetate. The organic layer was washed with a saturated saline, and was then dried over anhydrous magnesium sulfate, followed by vacuum concentration. The residue was purified by column chromatography (silica gel cartridge, hexane:ethyl acetate=75:25 to 50:50), so as to obtain the title compound (193 mg) in the form of a colorless solid.

Provenance & Evidence