反应详情

温度

50 °C

To a stirred suspension of 6-{trans-4-[3-(4-fluorophenyl)propylamino]-cyclohexyl}-3H-benzoxazol-2-one (110 mg, 0.81 mmol) in DMF (15 mL) was added NaHCO3 (140 mg, 1.6 mmol) and bromoacetamide (300 mg, 0.74 mmol). After 16 hours the reaction mixture was warmed to 50° C. After 4 hours, additional bromide (150 mg, 0.37 mmol) and NaHCO3 (31 mg, 0.37 mmol) were added, and the temperature was increased to 75° C. After 4 hours, the reaction mixture was cooled to room temperature, diluted with water and extracted with EtOAc. The combined organics were washed with water, saturated NaCl, dried (Na2SO4), filtered, and concentrated under reduced pressure. Purification by flash chromatography (silica, 95:4.75:0.25 CH2Cl2:MeOH:NH4OH) followed by conversion to the HCl salt gave compound 2-{[3-(4-fluorophenyl)propyl]-[4-(2-oxo-2,3-dihydro-benzoxazol-6-yl)-cyclohexyl]amino}acetamide (60 mg, 17%), as a white solid: mp 266-270° C.; IR (KBr): 3331, 3149, 2943, 1762, 1691 cm−1; 1H NMR (500 MHz, DMSO-d6): δ 11.47 (s, 1H), 9.08 (br s, 1H), 7.96 (br s, 1H), 7.73 (br s, 1H), 7.29-7.25 (m, 2H), 7.17-7.01 (m, 3H), 6.99 (s, 2H), 4.05-4.02 (m, 1H), 3.81-3.78 (m, 1H), 3.47-3.38 (m, 1H), 3.22-3.12 (m, 3H), 2.63 (t, J=8 Hz, 2H), 2.57-2.52 (m, 1H), 2.14-1.87 (m, 6H), 1.71-1.49 (m, 4H); ESI-MS (m/z): 426 [M+H]+; HPLC: method A, 5.44 minutes (98.0%); HPLC: method E, 6.50 minutes (>99%); Anal. Calcd for C24H28FN3O3.HCl: C, 61.80; H, 6.37; N, 9.01. Found: C, 61.78; H, 6.27; N, 8.80.

1. temperaturethe temperature was increased to 75° C
2. waitAfter 4 hours
3. temperaturethe reaction mixture was cooled to room temperature
4. extractionextracted with EtOAc
5. washThe combined organics were washed with water, saturated NaCl
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customPurification by flash chromatography (silica, 95:4.75:0.25 CH2Cl2:MeOH:NH4OH)