5-bromo-1,2-dimethyl-1H-imidazole → HCID 118006150, compound

Participants

Reaction Steps

A solution of n-BuLi (2.5 M in hexanes, 0.82 mL, 2.05 mmol) was added dropwise by syringe to a solution of 5-bromo-1,2-dimethyl-1H-imidazole (361.1 mg, 2.063 mmol) in dry THF (20 mL) in a dry ice-acetone bath. After 1-2 minutes, a solution of (4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,6-dimethylpyridin-3-yl)methanone (0.500 g, 1.03 mmol, Intermediate 12: step f) in dry THF (5 mL) was added dropwise. The reaction was stirred for 1.5 hours, then was removed from the cold bath and allowed to warm to room temperature. The reaction was quenched with saturated aqueous ammonium chloride. The mixture was partitioned between water and dichloromethane. The separated aqueous phase was further extracted with dichloromethane. The organic phase was dried (Na2SO4), filtered, and concentrated. The crude product was purified by flash column chromatography (silica gel, 0-3% MeOH-DCM) to provide the title compound. 1H NMR (400 MHz, CDCl3) δ 8.15 (d, J=2.2 Hz, 1H), 7.72 (d, J=8.7 Hz, 1H), 7.53-7.48 (m, 2H), 7.42-7.36 (m, 3H), 7.11 (d, J=8.0 Hz, 1H), 6.91 (d, J=8.0 Hz, 1H), 5.99 (s, 1H), 4.33 (s, 2H), 4.06 (s, 3H), 3.36 (s, 3H), 2.52 (s, 3H), 2.40 (s, 3H), 2.31 (s, 3H); MS m/e 581.1 [M+H]+.

Provenance & Evidence