Hydrogen Bromide → HCID 86639591, compound

Participants

Reaction Steps

A mixture of 1-methyl-piperidine-4-carboxylic acid (0.40 g, 2.79 mmol) and thionyl chloride (0.32 mL, 4.44 mmol) in dichloromethane (10 mL) was heated to reflux for 6 h. The reaction mixture was distilled under reduced pressure and the residue dissolved in dry acetonitrile (4 mL). Trimethylsilyl diazomethane (4 mL, 8.08 mmol) was added and the mixture stirred for 2 h at ambient temperature. The reaction was cooled to 0° C. and 30% HBr in acetic acid (2 mL) added dropwise. The reaction mixture was warmed to room temperature and stirred for 1 h. The precipitate was filtered and washed with ether to afford 2-bromo-1-(1-methyl-piperidin-4-yl)-ethanone hydrobromide (200 mg, 33%).

Provenance & Evidence