Hydrochloric Acid → 1-[4-(Trifluoromethyl)benzenesulfonyl]piperazine

Participants

Reaction Steps

To a solution of 1,1-dimethylethyl 4-{[4-(trifluoromethyl)phenyl]sulfonyl}-1-piperazinecarboxylate in 1,4-dioxane (100 ml) was added 4M HCl in 1,4-dioxane (50 ml, 200 mmol) and 3 drops of distilled water. The reaction mixture was stirred overnight and then reduced to dryness in vacuo. The residue was dissolved in DCM (200 ml) and washed with 2M aq. NaOH (50 ml), twice. The organic layer was dried over dried magnesium sulphate, the insolubles removed by filtration, and filtrate reduced to dryness in vacuo to yield the title compound (6.60 g) as a pale yellow solid.

Provenance & Evidence