Triethylamine → HCID 54757545, compound

Participants

Reaction Steps

1-Hydroxybenzotriazole hydrate (5.67 g, 42 mmol) and triethylamine (14.88 mL, 107 mmol) were added to 4-cyano-4,4-diphenylbutanoic acid (WO97/24325) (10.39 g, 39 mmol) and 4-phenoxy-piperidine hydrochloride (6.32 g, 36 mmol) in N,N-dimethylformamide (150 mL). The mixture was stirred for 10 minutes. 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (8.20 g, 42 mmol) was then added and the mixture was stirred at room temperature for 18 hours. The reaction mixture was then concentrated in vacuo and the residue was partitioned between ethyl acetate (100 mL) and water (100 mL). The organic layer was separated, washed with water (100 mL) and brine (30 mL), dried over magnesium sulfate and concentrated in vacuo. The residue was triturated with diethyl ether, filtered off, washed through with diethyl ether and purified by column chromatography on silica gel, eluting with pentane:ethyl acetate, 75:25 to 50:50, to afford the title compound as a white solid (14.4 g) in a 95% yield.

Provenance & Evidence