N-bromobutanimide → HCID 118075601, compound

Participants

Reaction Conditions

Reaction Steps

A 50-mL round bottomed flask equipped with a magnetic stir bar and thermocouple was charged with rac-2-methyl-5-phenoxy-1,2,3,4-tetrahydroquinoline (0.574 g, 2.399 mmol) and acetonitrile (11.5 mL). The solution was cooled to 0° C., and N-bromosuccinimide (0.427 g, 2.399 mmol) was added in one portion. The solution turned yellow, and the internal temperature rose to 5° C. before falling back to 0° C. After 10 min, additional N-bromosuccinimide (0.021 g, 0.120 mmol) was added. After an additional 10 min, the reaction mixture was removed from the ice bath and concentrated under reduced pressure. The residue was then partitioned between ethyl acetate and 10% aqueous sodium carbonate solution. The layers were separated, and the ethyl acetate layer was washed with 5% aqueous sodium chloride solution (10 mL) and concentrated to a yellow oil (0.81 g). The crude product was purified by column chromatography on silica gel (eluting with 12:1 hexanes-ethyl acetate followed by 10:1 hexanes-ethyl acetate) to afford rac-6-bromo-2-methyl-5-phenoxy-1,2,3,4-tetrahydroquinoline (0.60, 79%) as a colorless syrup. MS (ESI, pos. ion) m/z 318, 320 [M+1].

Provenance & Evidence