反应详情

温度

60 °C

To a suspension of tert-butyl 5-bromo-3-[(1S)-1-(2-chloro-3-fluoro-6-hydroxyphenyl)ethyl]-1H-pyrrolo[2,3-b]pyridine-1-carboxylate (84.5 mg, 0.180 mmol) and potassium carbonate (104.5 mg, 0.7561 mmol) in DMF (3 mL), ((4S)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl 4-methylbenzenesulfonate (103.6 mg, 0.3618 mmol) in DMF (2 mL) was added and the reaction mixture was heated to 60° C. for a total of 23 h. EtOAc was added to dilute the reaction mixture and a standard aqueous workup was performed. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The crude was adsorbed onto a pre-filled silica gel loading cartridge [RediSepRf 5 gram] and purified using the Teledyne/ISCO system [RediSepRf 12 g Gold Silica], eluting with a 5-20% EtOAc:heptane solvent system. Fractions containing product were combined and concentrated in vacuo. The material obtained was dissolved in MeOH, passed through a syringe filter, and purified a second time by MDP, under acidic conditions (formic acid). Fractions containing product were pooled together and concentrated in vacuo, affording the title material as a clear and colorless film. 1H NMR (400 MHz, CDCl3): δ=8.43 (d, J=2.3 Hz, 1H), 7.53 (s, 1H), 7.53 (s, 1H), 7.02 (dd, J=9.1, 8.3 Hz, 1H), 6.70 (dd, J=9.1, 4.0 Hz, 1H), 4.92 (q, J=7.0 Hz, 1H), 4.31 (quint, J=5.7 Hz, 1H), 3.97 (dd, J=8.3, 6.6 Hz, 1H), 3.91 (dd, J=9.0, 5.9 Hz, 1H), 3.65 (br s, 1H), 3.46 (br s, 1H), 1.76 (d, J=7.1 Hz, 3H), 1.69 (s, 9H), 1.36 (d, J=5.3 Hz, 6H). MS (ES+): m/z 605.30/606.98/608.99 (23/61/9) [MH++Na]. HPLC: tR 4.15 min (ZQ3, nonpolar—5 min).

1. additionwas added
2. additionto dilute the reaction mixture
3. washThe combined organic layers were washed with brine
4. dry with materialdried over anhydrous Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. custompurified
8. washeluting with a 5-20% EtOAc
9. additionFractions containing product
10. concentrationconcentrated in vacuo
11. customThe material obtained
12. custompassed through a syringe
13. filtrationfilter
14. custompurified a second time by MDP
15. additionFractions containing product
16. concentrationconcentrated in vacuo