Imidazole → HCID 123278338, compound

Participants

Reaction Steps

To a brown clear solution of 1-(3-chloroquinolin-4-yl)-2-nitroethanol (A275-4) (0.423 g, 1.68 mmol) in DMF (4.19 mL) at room temperature was added imidazole (0.342 g, 5.03 mmol) and triethylsilyl chloride (0.341 mL, 2.01 mmol). The mixture was stirred at room temperature. After 2 h, the mixture was quenched with water (50 mL) and extracted with EtOAc (2×50 mL). The organic extract washed with 1 M LiCl (1×50 mL) and brine (1×50 mL), and dried over Na2SO4. The solution was filtered and concentrated in vacuo to give the crude material as a yellow syrup. The crude material was absorbed onto a plug of silica gel and purified by chromatography through a REDISEP pre-packed silica gel column (40 g), eluting with a gradient of 0% to 10% EtOAc in hexane, and dried under high vacuum to give 3-chloro-4-(2-nitro-1-((triethylsilyl)oxy)ethyl)quinoline (A275-5). 1H NMR (400 MHz, DMSO-d6) δ 8.95 (1H, s), 8.67 (1H, d, J=7.4 Hz), 8.10 (1H, dd, J=8.4, 0.8 Hz), 7.84 (1H, td, J=7.6, 1.4 Hz), 7.71-7.79 (1H, m), 6.38 (1H, dd, J=9.8, 2.5 Hz), 5.14-5.23 (1H, m), 5.03-5.11 (1H, m), 0.65-0.74 (9H, m), 0.32-0.51 (6H, m); LCMS (ESI) m/z 367.1 (M+H)+.

Provenance & Evidence