Diisopropylethylamine → HCID 57979768, compound

Participants

Reaction Steps

To a stirred solution of (3R,5R)-benzyl 3,5-dimethylpiperazine-1-carboxylate (500 mg, 2.02 mmol) in anhydrous dichloromethane (8 mL) was added diisopropylethylamine (1.4 mL, (8.08 mmol) followed by 4-tert-butylbenzene-1-sulfonyl chloride (940 mg, 4.04 mmol). The reaction mixture was stirred for 68 hours. Reaction was complete as determined by TLC. After solvent evaporation the crude product was purified by flash column chromatography to afford benzyl (3S,5S)-4-[(4-tert-butylphenyl)sulfonyl]-3,5-dimethylpiperazine-1-carboxylate in 42% yield (377 mg) as light yellow oil.

Provenance & Evidence