Diisopropylethylamine → Benzhydryl-3,5-cis-dimethylpiperazine

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Reaction Steps

Benzhydryl bromide (4.33 g, 17.5 mmol) is added to s stirred solution of 2,6-cis-dimethylpiperazine (2.00 g, 17.5 mmol) and diisopropylethylamine (2.94 g, 22.8 mmol) in anhydrous dichloromethane (50 mL) at 0° C. The resultant mixture is allowed to stir overnight. After concentration and subsequent chromatography on silica gel, eluting with 2 M NH3/CH3OH in dichloromethane: 1-3%, benzhydryl-3,5-cis-dimethyl-piperazine is obtained as a white solid (3.0 g, 61% yield).

Provenance & Evidence