1-Bromo-4-iodobenzene → 1-Boc-4-(4-bromo-phenyl)-piperidin-4-ol

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 1-bromo-4-iodobenzene (93.7 g, 331 mmol) in tetrahydrofuran (800 mL) under nitrogen at −78° C. was added drop-wise a solution of butyllithium (150 mL, 2.43 M in THF) over 30 min. The resulting solution was stirred for 2 h at −78° C. A solution of tert-butyl 4-oxopiperidine-1-carboxylate (60 g, 301 mmol) in tetrahydrofuran (800 mL) was then added drop-wise with stirring at −78° C. over 30 min. The mixture was stirred for 1 h at −78° C., then the reaction was carefully quenched with water (350 mL). The resulting mixture was extracted with ethyl acetate (2×400 mL) and the combined organic layers were dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified using silica gel column chromatography with ethyl acetate/petroleum ether (1:200-1:10) as the eluent to yield 91 g (85%) of the title compound as a yellow oil.

Provenance & Evidence