反应详情

1-Butoxycarbonyl-4-aminomethylpiperidine (51) (0.30 g; 1.4 mmol) is dissolved in DMF (10 mL) at ambient temperature. 5-Phenyl-2-(3-phenyl-propyl)-pentanoic acid (22) (0.415 g: 1.4 mmol) is added followed sequentially by 1-hydroxybenzotriazole (0.2364 g; 1.75 mmol), triethylamine (0.2439 mL; 1.75 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.2952 g; 1.54 mmol). The mixture is stirred at ambient temperature for 18 hours then poured onto ethyl acetate (300 mL) and extracted sequentially with water (100 mL), 1N HCl (50 mL), saturated NaHCO3 (50 mL), and brine (50 mL). The organic layer is dried (MgSO4), filtered, and concentrated in vacuo. The residue is purified via silica gel chromatography with gradient elution (10%→50% ethyl acetate in hexanes) affording the desired compound (0.67 g) as a colorless oil. ESMS: MH+ 493.4

1. additionthen poured onto ethyl acetate (300 mL)
2. extractionextracted sequentially with water (100 mL), 1N HCl (50 mL), saturated NaHCO3 (50 mL), and brine (50 mL)
3. dry with materialThe organic layer is dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue is purified via silica gel chromatography with gradient elution (10%→50% ethyl acetate in hexanes)