反应详情

温度

60 °C

To a solution of 4-bromo-1-methyl-1H-pyrazole-3-carboxylic acid (20.0 mg, 0.0976 mmol) in THF (3 mL, 40 mmol) was added 1.0 M of BH3.THF in THF (0.49 mL, 0.49 mmol), and the resulting solution was heated to 60° C. overnight. The material was extracted with EtOAc and washed with sat. NaHCO3 (3×) to remove carboxylic acid starting material. The organic layer was concentrated in vacuo. 3-[(S)-1-(2-Chloro-3-fluoro-6-methoxyphenyl)-ethyl]-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine (15.0 mg, 0.0348 mmol), (1,1′bis-(diphenylphosphino)-ferrocene) palladium dichloride (3.57 mg, 0.00488 mmol), K2CO3 (20.2 mg, 0.146 mmol) and 4:1 dioxane:H2O (1 mL, 10 mmol) were added, and the mixture was heated to 95° C. for 30 min. The solution was used directly for HPLC purification, and the fractions containing the pure product were concentrated in vacuo to afford the title compound as a white solid. 1H NMR (400 MHz, CD3OD): δ=1.80 (d, J=7.1 Hz, 3H), 3.68 (br. s., 3H), 3.90 (s, 3H), 4.45-4.55 (m, 2H), 5.10-5.16 (m, 1H), 6.89 (dd, J=9.1, 4.3 Hz, 1H), 7.07 (t, J=8.8 Hz, 1H), 7.31 (d, J=1.3 Hz, 1H), 7.65 (s, 1H), 7.68 (s, 1H), 8.27 (br. s., 1H). MS (ES+): m/z=415.12/417.13 (100/50) [MH+]. HPLC: tR=1.35 min (polar—3 min, UPLC-ACQUITY).

1. extractionThe material was extracted with EtOAc
2. washwashed with sat. NaHCO3 (3×)
3. customto remove carboxylic acid starting material
4. concentrationThe organic layer was concentrated in vacuo
5. temperaturethe mixture was heated to 95° C. for 30 min
6. customThe solution was used directly for HPLC purification
7. additionthe fractions containing the pure product
8. concentrationwere concentrated in vacuo