Triethylamine → HCID 73776183, compound

Participants

Reaction Steps

Triethylamine (535 μL, 3.8 mmol) was added to 2-(4-chloro-3,5-diphenyl-1Hpyrazolo[3,4-c]pyridazin-1-yl)acetic acid (700 mg, 1.92 mmol) in THF (20 mL) at 0° C., followed by the addition of isobutylchloroformate (342 mg, 2.9 mmol). The reaction mixture was stirred for 1 h. Sodium borohydride (220 mg, 5.8 mmol) was then added portionwise and the reaction mixture was stirred at room temperature for 3 h. The reaction mixture was diluted with 0.5 M HCl and the aqueous layer was extracted twice with ethyl acetate. The combined organic phases were washed with water and brine, dried (phase separator), and concentrated in vacuo. The residue was purified by chromatography (silica gel, ethyl acetate/isohexane 0:1 to 1:0), to provide Compound 12 as a solid (50 mg).

Provenance & Evidence