Hydrochloric Acid → HCID 59607657、化合物
反応式
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:13]=[CH:12][C:11]([CH2:14][C@@H:15]([NH:22][C:23]([C:25]3[O:29][C:28]([O:30]C)=[N:27][CH:26]=3)=[O:24])[CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])=[CH:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1.Cl>O1CCOCC1>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:9]=[CH:10][C:11]([CH2:14][C@@H:15]([NH:22][C:23]([C:25]3[O:29][C:28](=[O:30])[NH:27][CH:26]=3)=[O:24])[CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])=[CH:12][CH:13]=2)[CH:5]=[CH:6][CH:7]=1参加物
4
実験手順
To a solution of (R)-ethyl 4-(3′-chlorobiphenyl-4-yl)-3-(2-methoxyoxazole-5-carboxamido)butanoate, intermediate 14, (103 mg, 0.23 mmol) in dioxane (3 mL) is added 4 N solution of HCl in dioxane (0.29 mL, 1.16 mmol). The crude was stirred at room temperature for 2 hrs. The crude is concentrated and is diluted in water and EtOAc. The organic layer is washed with brine, dried over MgSO4, filtered, and concentrated. 50% of the crude is purified via RP-HPLC (SunFire C18, H2O (0.1% TFA)/CH3CN) to give (R)-ethyl 4-(3′-chlorobiphenyl-4-yl)-3-(2-oxo-2,3-dihydrooxazole-5-carboxamido)butanoate (38 mg) as a white solid. HPLC retention time=1.66 minutes (condition A); MS (m+1)=429.4; 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.29 (t, J=7.1 Hz, 3 H) 2.51-2.69 (m, 2 H) 2.95 (dd, 1 H) 3.05 (dd, 1 H) 4.19 (q, 2 H) 4.58-4.75 (m, 1 H) 6.83 (d, J=8.8 Hz, 1 H) 7.26-7.33 (m, 4 H) 7.35 (t, J=7.7 Hz, 1 H) 7.45 (dt, J=7.6, 1.5 Hz, 1 H) 7.51 (d, J=8.3 Hz, 2 H) 7.56 (t, J=1.8 Hz, 1 H) 8.45 (br. s., 1 H).