反应详情

To a solution of (R)-3-[N-(5′-chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(5-oxo-1-phenyl-4,5-dihydro-1H-[1,2,4]triazole-3-carbonyl)hydrazino]-2-hydroxypropionic acid (200 mg, 335 μmol) in dry DMF (6 mL) was added chloromethyl butyrate (68 mg, 503 mmol), NaI (101 mg, 670 mmol), and 2,6-dimethylpyridine (143 mg, 1.3 mmol) in portions at room temperature. The resulting mixture was stirred at room temperature for 8 hours. Water (12 mL) was added and the mixture was extracted with EtOAc (3×20 mL). The combined organic layers were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (PE:EtOAc=3:1) to yield the title compound as a white solid (21 mg). LC-MS: 625.9 [M+H]+. 1H NMR (DMSO-d6, 400 MHz) δ 0.84 (t, J=7.4 Hz, 3H), 1.45-1.56 (m, 2H), 2.29 (t, J=7.3 Hz, 2H), 3.31-3.17 (m, 2H), 4.18-4.35 (m, 2H), 4.35 (t, J=5.3 Hz, 1H), 5.68-5.79 (m, 2H), 7.28 (t, J=7.4 Hz, 1H), 7.34-7.40 (m, 1H), 7.43-7.55 (m, 7H), 7.58 (dd, J=6.8, 2.6 Hz, 1H), 7.90 (d, J=7.6 Hz, 2H), 9.98 (s, 1H), 12.76 (s, 1H).

1. extractionthe mixture was extracted with EtOAc (3×20 mL)
2. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
3. concentrationconcentrated in vacuo
4. customThe residue was purified by column chromatography (PE:EtOAc=3:1)