1,4-Dibromobutane → HCID 53810368, compound

Participants

Reaction Steps

To a solution of 1-(tert-butoxycarbonyl)-4-hydroxypiperidine (6 g) in N,N-dimethylformamide (30 ml) was portion wise added sodium hydride (60%, 1.6 g) at 5° C. with stirring. The mixture was stirred at room temperature for 0.5 hour and at 60° C. for an hour. To the reaction mixture was added dropwise 1,4-dibromobutane (19 g) at 5° C. with stirring. The mixture was stirred at room temperature for 4 hours and at 50° C. for 2 hours. The reaction mixture was poured into ice-water and extracted with a mixture of ethyl acetate and tetrahydrofuran (1:1). The organic layer was washed with saturated sodium chloride aqueous solution and dried over magnesium sulfate. The magnesium sulfate was filtered under reduced pressure, and the filtrate was concentrated under reduced pressure to give oil. The oil was subjected to column chromatography on silica gel (silica gel 60 F254, Merck) and eluted with a mixture of ethyl acetate and n-hexane (1:10-1:3). The fractions containing the objective compound were combined and concentrated under reduced pressure to give 1-(tert-butoxycarbonyl)-4-[(4-bromo)butoxy]piperidine (1.5 g).

Provenance & Evidence