反应详情

A stirred solution of methyl 6-[5-ethyl-2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinamido]hexanoate (5.14 g, 12.35 mmol) in tetrahydrofuran is treated with 2N sodium hydroxide (15 mL). The resulting mixture is stirred at room temperature for 24 hours. After this period, the reaction mixture is concentrated in vacuo to obtain a residue. The residue is cooled with an ice bath and acidified with concentrated hydrochloric acid. The resulting precipitate is isolated by vacuum filtration and washed with water to give the title product as a white solid, mp 76°-81° C.

1. waitAfter this period
2. concentrationthe reaction mixture is concentrated in vacuo
3. customto obtain a residue
4. temperatureThe residue is cooled with an ice bath
5. customThe resulting precipitate is isolated by vacuum filtration
6. washwashed with water