反应详情

温度

80 °C

1,1-Dimethylethyl 2-(4-bromophenyl)-1H-imidazole-1-carboxylate (457 mg, 1.41 mmol) and (4-{[(1,1-dimethylethyl)oxy]carbonyl}-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl)boronic acid (example 1, step 2) (456 mg, 1.55 mmol) were taken into dioxane (5 mL) and water (1 mL) followed by addition of DIPEA (1.1 mL, 6.2 mmol) and dichloro[1,1-bis(diphenylphosphino]ferrocenepalladium (II) dichloromethane adduct (58 mg) then the mixture was heated at 80° C. over 12 h. The mixture was cooled then partitioned with ethyl acetate and 10% aqueous citric acid. The organic solution was washed with brine, dried over anhydrous sodium sulfate then filtered and concentrated. The residue thus obtained was taken into methanol (10 mL) followed by addition of sodium hydroxide (180 mg, 4.5 mmol) in water (1 mL). The mixture was stirred at room temperature for 30 minutes then neutralized by addition of 10% aqueous citric acid then concentrated. The aqueous residue was partitioned with ethyl acetate and saturated aqueous sodium bicarbonate and the organic solution was washed with brine, dried over anhydrous sodium sulfate then filtered and concentrated to give 1,1-dimethylethyl 7-[4-(1H-imidazol-2-yl)phenyl]-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate (490 mg, 89% yield). MS (EI) for C23H25N3O3: 392 (MH+).

1. temperatureThe mixture was cooled
2. customthen partitioned with ethyl acetate and 10% aqueous citric acid
3. washThe organic solution was washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationthen filtered
6. concentrationconcentrated
7. customThe residue thus obtained
8. concentrationthen concentrated
9. customThe aqueous residue was partitioned with ethyl acetate and saturated aqueous sodium bicarbonate
10. washthe organic solution was washed with brine
11. dry with materialdried over anhydrous sodium sulfate
12. filtrationthen filtered
13. concentrationconcentrated