Imidazole → 1-[4-(2-Bromo-ethyl)-piperidin-1-yl]-ethanone

Participants

Reaction Steps

To a solution of 1-[4-(2-hydroxy-ethyl)-piperidin-1-yl]-ethanone (0.500 g, 2.92 mmol) in dichloromethane (15 mL) was added carbon tetrabromide 1.45 g, 4.38 mmol), triphenyl phosphine (0.728 g, 2.77 mmol) and imidazole (0.398 g, 5.84 mmol) at 0° C. The temperature of the reaction mixture was slowly raised to room temperature and stirring continued at rt for 18 h. The reaction was diluted with dichloromethane and washed with water. The organic layer was dried (Na2SO4), filtered, and the solvent was evaporated. The product was chromatographed over silica gel using gradient of 0-10% methanol in dichloromethane. GC-MS m/z 235.

Provenance & Evidence