Trifluoroacetic acid → 1-(4-Chlorophenyl)piperazine

Participants

Reaction Conditions

Reaction Steps

Trifluoroacetic acid (3 mL) was added dropwise with stirring at 0° C. to a solution of t-butyl 4-(4-chlorophenyl)piperazine-1-carboxylate (360.6 mg, 1.21 mmol, 1.00 equiv) in dichloromethane (12 mL). The resulting solution was stirred for 3 h at 20° C. in an oil bath. The pH value of the solution was adjusted to 7-8 with a saturated solution of sodium bicarbonate. The resulting solution was extracted with 6×20 mL of dichloromethane, the organic layers combined and dried over anhydrous sodium sulfate and concentrated under vacuum. This resulted in 264.5 mg (102%) of 1-(4-chlorophenyl)piperazine as a yellow solid.

Provenance & Evidence