Ammonium Chloride → 1-Boc-4-methyl-piperidin-4-OL

Participants

Reaction Steps

A solution of 3M methyl magnesium bromide in diethyl ether (2.0 mL) in diethyl ether (3 mL) at 0° C. was treated with a solution of tert-butyl 4-oxo-1-piperidinecarboxylate (1.0 g, 5.00 mmol) in diethyl ether (5 mL), warmed to room temperature, stirred for 18 hours, treated with saturated NH4Cl, and extracted with diethyl ether. The combined extracts were washed with brine, dried (MgSO4), filtered, and concentrated. The concentratet was purified by flash chromatography on silica gel with 20%-50% ethyl acetate/heptane to provide the desired product. MS (DCI(+)) m/e 216 (M+H)+.

Provenance & Evidence