反应详情

温度

-40 °C

To a solution of 4-bromo-1,2-dimethylbenzene (77 mg, 0.42 mmol) in THF (1 mL) at −78° C. was added a solution of 1.4 M s-BuLi in cyclohexane (0.33 ml, 0.46 mmol). The crude was warmed to −40° C. and stirred between −40° C. and −30° C. for 1 hr. The crude was cooled to −60° C. A solution of 3-fluoro-4-((R)-7-oxo-6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-benzonitrile (50 mg, 0.21 mmol) in THF (1 mL) was added. The crude was stirred at −60° C. for 1 hr. The crude was warmed to room temperature in 4 hrs. The crude was quenched with NH4Cl and diluted with EtOAc. The organic layer was washed with brine, dried over MgSO4, filtered, and concentrated. The crude was purified via preparation plate using 7% (2M NH3 in MeOH)/CH2Cl2 to give 7.8 mg of the entitled product as the major diastereomer. MS 348.1 (M+H); LCMS condition A, retention time 1.31 min. 1H NMR (400 MHz, CDCl3) δ ppm 2.20 (s, 3H), 2.20 (s, 3H), 2.91 (dd, 1H), 3.29 (dd, 1H), 5.71 (d, 1H), 6.87 (s, 1H), 7.07 (d, 1H), 7.10-7.20 (m, 2H), 7.21 (s, 1H), 7.34 (d, 1H), 7.36 (s, 1H), 7.39-7.43 (m, 1H).

1. temperatureThe crude was cooled to −60° C
2. stirringThe crude was stirred at −60° C. for 1 hr
3. temperatureThe crude was warmed to room temperature in 4 hrs
4. customThe crude was quenched with NH4Cl
5. additiondiluted with EtOAc
6. washThe organic layer was washed with brine
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated
10. customThe crude was purified via preparation plate