Cyclohexane → 4-((5R,7S)-7-(3,4-dimethylphenyl)-7-hydroxy-6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-fluorobenzonitrile

Participants

Reaction Conditions

Reaction Steps

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).

Provenance & Evidence