Benzyl Alcohol → HCID 67223002, compound

Participants

Reaction Steps

To a solution of an optically-active compound of 3-allylpiperidine-1,3-dicarboxylic acid 1-tert-butyl ester (32.2 g) and triethylamine (33.2 ml) in toluene (320 ml) heated to 80° C. was added dropwise diphenylphosphoryl azide (33.4 ml) over 50 minutes. The reaction mixture was stirred at the same temperature for 2 hours and cooled to room temperature. To the mixture were added benzyl alcohol (24.6 ml) and 4-dimethylaminopyridine (2.9 g). The mixture was stirred at 100° C. for 21 hours and cooled to room temperature. Then, thereto were added ethanol (200 ml) and water (200 ml), and the mixture was extracted with n-hexane (200 ml). The separated organic layer was sequentially washed with saturated aqueous ammonium chloride solution (200 ml) and saturated aqueous sodium chloride solution (150 ml), and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/0 to 6/1) to give the titled compound (39.4 g).

Provenance & Evidence