Triethylamine → 1-(4-Bromophenyl)-4-(methylsulfonyl)piperazine

Participants

Reaction Steps

To a solution of 1-(4-bromophenyl)piperazine hydrochloride (5.09 g, 18.3 mmol, CAS number 68104-62-1) and triethylamine (7.67 mL), in CH2Cl2 was added methanesulfonyl chloride (2.83 mL, 36.3 mmol) dropwise. The mixture was stirred for one hour at RT, then CH2Cl2 (100 mL) was added. The organics were washed with water (2×100 mL), and evaporated in vacuo to give a yellow solid which crystallised from ethanol and was washed with ether to give 1-(methylsulfonyl)-4-(4-bromophenyl)piperazine as a white powder (4.74 g, 81%).

Provenance & Evidence