Sodium hydride → Benzyl 4-((1R,2S)-2-{2-[(3-methyl-5-nitropyridin-2-yl)oxy]ethyl}cyclopropyl)piperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To the solution of benzyl 4-[(1R,2S)-2-(2-hydroxyethyl)cyclopropyl]piperidine-1-carboxylate (Intermediate 10, 1.84 g, 6.06 mmol) in 15 ml of DMSO was added NaH and the resulting solution was stirred at 45° C. for 15 min. The mixture was then cooled to 0° C. via an ice/water bath and 2-chloro-3-methyl-5-nitropyridine (1.05 g, 6.06 mmol) was added in portions. The reaction mixture turned dark and became a slurry. After 10 minutes, the ice/water bath was removed and 20 ml of DMSO was added. The resulting mixture was stirred for 40 minutes allowing to warm to room temperature. The reaction was quenched by water and extracted with ethyl acetate (3×100 mL). The organics were combined and washed with brine, dried on sodium sulfate, filtered and the filtrate concentrated under reduced pressure. The residue was purified via Biotage column (65M silica gel) using ethyl acetate in hexane (0-60%, 1000 ml) to afford the title compound. MS (ESI) m/z 440 [M+H]+.

Provenance & Evidence