Sodium Hydroxide → HCID 86700513, compound

Participants

Reaction Steps

To a solution of (S)-3-methyl-piperazine-1-carboxylic acid tert-butyl ester (1.0 g, mmol) and N-benzyloxycarbonyl-4-piperidone (1.2 g, 5 mmol) in methanol (8 mL) was added acetic acid (0.28 mL) and the solution was stirred at RT for 1 h. Sodium cyanoborohydride (310 mg, 5 mmol) was added and the reaction mixture was stirred at 45° C. overnight and then 1 N NaOH (5 mL) was added. The aqueous phase was extracted with EtOAc (3×15 mL). The combined organic extracts were washed with brine, dried over MgSO4, filtered, concentrated under vacuum, and purified by silica gel chromatography (0-5% MeOH/DCM). Pure fractions were combined and concentrated under vacuum to provide the title intermediate (0.71 g, 30% yield) as a clear oil. (m/z): [M+H]+ calcd for C23H35N3O4 418.26 found 418.1.

Provenance & Evidence