Pyridine → 4-(4-Trifluoromethoxyphenyl)piperazine-1-carbonylchloride

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-(4-trifluoromethoxyphenyl)piperazine (1.0 g, 4.1 mmol), triphosgene (0.42 g, 1.4 mmol), and pyridine (0.66 ml, 8.2 mmol) in toluene (20 ml) was stirred at 100° C. for 4.5 hours. To which ethyl acetate was added, and the mixture was washed with water, dried over magnesium sulfate. After filtration, the filtrate was concentrated under reduced pressure to afford 4-(4-trifluoromethoxyphenyl)piperazine-1-carbonylchloride (1.3 g, quantitative) as a brown oil.

Provenance & Evidence