Formaldehyde → HCID 66935901, compound

Participants

Reaction Steps

To a solution of phenylmethyl trans-2,5-dimethyl-1-piperazinecarboxylate (enantiomeric mixture) (1.35 g, 5.43 mmol) in dichloromethane (40 mL) at 0° C. was added formaldehyde (0.817 mL, 37% water solution, 10.87 mmol) followed by sodium triacetoxyborohydride (1.726 g, 8.14 mmol). The reaction mixture was allowed to warm to room temperature and stirred for 2 h before being diluted with dichloromethane and washed with 1N NaOH solution. The organics were washed with brine, dried (MgSO4) and evaporated to yield phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate (enantiomeric mixture) (1.42 g, 100%). Phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate (enantiomer 1) (480 mg) and phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate (enantiomer 2) (400 mg) were separated by chiral chromatography. LCMS: (M+H)+: 263.3.

Provenance & Evidence