Triethylamine → 3-(1-methylethyl)-4-(((2S)-4-(2-thiophenylsulfonyl)-2-piperazinyl)methyl)-2-piperazinone

Participants

Reaction Steps

To a stirred solution of 3-(1-methylethyl)-4-((2R)-2-piperazinylmethyl)-2-piperazinone (0.161 g, 0.670 mmol, Example 184) and triethylamine (0.290 mL, 2.083 mmol) in dichloromethane (5.82 mL) was added a solution of 2-thiophenesulfonyl chloride (0.138 g, 0.756 mmol, Sigma-Aldrich, St. Louis, Mo.) in CH2Cl2 (1 mL) drop-wise at room temperature. The solution was stirred for 30 min and then the mixture was concentrated. The residue was re-dissolved in CH2Cl2 and washed with water followed by brine. The organic layer was dried (Na2SO4), filtered, and concentrated to give 3-(1-methylethyl)-4-(((2S)-4-(2-thiophenylsulfonyl)-2-piperazinyl)methyl)-2-piperazinone (242 mg).

Provenance & Evidence