反应详情

温度

25 °C

A mixture of (R)-3-[N-(5′-chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionic acid (200 mg, 430 mmol), (S)-2-methoxycarbonylamino-3-methylbutyric acid chloromethyl ester (193 mg, 860 mmol), NaI (129 mg, 860 μmol) and pyridine (136 mg, 1.7 mmol) in DMF (5.0 mL) was stirred at 25° C. overnight. The mixture was then poured into water (30 mL) and extracted with EtOAc (3×20 mL). The combined organic layers were washed with saturated aqueous NaCl (30 mL), dried over anhydrous Na2SO4, and concentrated in vacuo. The residue was purified by column chromatography (PE:EtOAc=1:1) to yield the title compound as a colorless liquid (7 mg). LC-MS: 651.1 [M+H]+. 1H NMR (CD3OD, 400 MHz): δ 0.95-0.97 (m, 6H), 2.06-2.14 (m, 1H), 3.34-3.39 (m, 2H), 3.69 (s, 3H), 3.98 (s, 3H), 4.08-4.11 (m, 1H), 4.22-4.24 (m, 2H), 4.38-4.40 (m, 1H), 5.78-5.91 (m, 2H), 6.54 (s, 1H), 7.18-7.22 (m, 1H), 7.34-7.36 (m, 1H), 7.46-7.55 (m, 5H).

1. extractionextracted with EtOAc (3×20 mL)
2. washThe combined organic layers were washed with saturated aqueous NaCl (30 mL)
3. dry with materialdried over anhydrous Na2SO4
4. concentrationconcentrated in vacuo
5. customThe residue was purified by column chromatography (PE:EtOAc=1:1)