反应详情

1-Benzyl-4-aminopiperidine (0.5 g; 2.63 mmol) is dissolved in DMF (25 mL) at ambient temperature. 5-Phenyl-2-(3-phenyl-propyl)-pentanoic acid (22) (0.78 g; 2.62 mmol), triethylamine (0.46 mL; 3.28 mmol), 1-hydroxybenzotriazole (0.444 g; 3.28 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.554 g; 2.89 mmol) are added sequentially. The mixture is stirred for 18 hours at ambient temperature then poured onto ethyl acetate (250 mL) and extracted successively with water (50 mL), saturated aqueous sodium bicarbonate (50 mL), and brine (50 mL), then dried over MgSO4, filtered, and concentrated in vacuo. The residue is purified via silica gel chromatography with gradient elution (10%→67% ethyl acetate in hexanes) affording the desired product (1.07 g) as a white solid. ESMS: MH+ 469.4 (base).

1. additionthen poured onto ethyl acetate (250 mL)
2. extractionextracted successively with water (50 mL), saturated aqueous sodium bicarbonate (50 mL), and brine (50 mL)
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue is purified via silica gel chromatography with gradient elution (10%→67% ethyl acetate in hexanes)