反应详情

温度

95 °C

Isobutyl 5-bromo-2-(2-fluoroethylamino)-1H-benzo[d]imidazole-1-carboxylate (76 mg, 0.21 mmol) and (4-{5-[(4-fluorophenyl)methyl]-6-methylpyrimidin-4-yl}-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl)boronic acid (example 8 step 2) (100 mg, 0.25 mmol), and [1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) (8.5 mg, 0.01 mmol) were taken into dioxane (1 mL) and water (200 uL) followed by addition of DIPEA (180 uL, 1.03 mmol) and the mixture was heated to 95° C. over 12 h. On cooling to room temperature the crude mixture was diluted with ethyl acetate and dried over anhydrous sodium sulfate then filtered through a bed of silica gel. The filtrate was concentrated and the residue taken into methanol (5 mL) and basified by addition of 5 drops of 50% aqueous sodium hydroxide. The methanol solution was stirred for 0.5 h at room temperature then concentrated. The residue was partitioned with isopropyl acetate and 1M aqueous sodium hydroxide. The organic phase was washed twice with additional 1M aqueous sodium hydroxide then dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography using 20:1 ethyl acetate:ethanol then 10% methanol in dichloromethane as eluent. Fractions containing pure material were concentrated and the residue triturated with ethyl ether. The suspension collected by filtration to give N-(2-fluoroethyl)-5-(4-{5-[(4-fluorophenyl)methyl]-6-methylpyrimidin-4-yl}-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl)-1H-benzimidazol-2-amine (27.4 mg, 25% yield). 1H NMR (400 MHZ, DMSO-d6): 10.84 (br s, 1H), 8.50 (s, 1H), 7.34 (d, 1H), 7.26 (br s, 1H), 7.18 (d, 1H), 7.12 (d, 4H), 6.98-6.91 (m, 3H), 6.85 (s, 1H), 4.68 (m, 1H), 4.55 (m, 1H), 4.46 (s, 2H), 4.25 (br s, 2H), 4.01 (s, 2H), 3.77 (br s, 2H), 2.16 (s, 3H). MS (EI) for C30H28F2N6O: 528 (MH+).

1. dry with materialdried over anhydrous sodium sulfate
2. filtrationthen filtered through a bed of silica gel
3. concentrationThe filtrate was concentrated
4. additionbasified by addition of 5 drops of 50% aqueous sodium hydroxide
5. concentrationthen concentrated
6. customThe residue was partitioned with isopropyl acetate and 1M aqueous sodium hydroxide
7. washThe organic phase was washed twice with additional 1M aqueous sodium hydroxide
8. dry with materialthen dried over anhydrous sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated
11. customThe residue was purified by silica gel chromatography
12. additionFractions containing pure material
13. concentrationwere concentrated
14. customthe residue triturated with ethyl ether
15. filtrationThe suspension collected by filtration