反应详情

To an ice cooled solution of cyanoacetic acid (37 mg, 0.43 mmol) in DMF (2 mL) was added 7-aza-1-hydroxybenzotriazole (HOAt; 59 mg, 0.43 mmol), O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HATU; 165 mg, 0.43 mmol), diisopropylethylamine (DIPEA; 167 μL, 0.958 mmol) and 1-(4-(2-(diethylamino)ethoxy)phenyl)butan-1-amine (25; 115 mg, 0.43 mmol). The resulting mixture was then stirred at room temperature for 18 hours. The reaction mixture was diluted with ethyl acetate, washed with sat. aqueous NaHCO3 (2×) and sat. brine, dried over sodium sulfate, and concentrated to a thick yellow oil. Purification by flash silica gel column chromatography, eluting with 5:95 methanol/dichloromethane, afforded 29 (116 mg, 80%) as a yellow oil: MS (ES+) m/z 332.2 (M+H)+.

1. washwashed with sat. aqueous NaHCO3 (2×) and sat. brine
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated to a thick yellow oil
4. customPurification by flash silica gel column chromatography
5. washeluting with 5:95 methanol/dichloromethane