Water → (2S)-2-Methyl-1-[(6-methyl-3-pyridinyl)carbonyl]-4-{[4-(trifluoromethyl)phenyl]sulfonyl}piperazine

Participants

Reaction Steps

To a solution of (3S)-3-methyl-1-{[4-(trifluoromethyl)phenyl]sulfonyl}piperazine (Description 2) (100 mg, 0.324 mmol) in DMF (5 ml) was added DIPEA (0.170 ml, 0.973 mmol), HOBT.H2O (49.7 mg, 0.324 mmol), HBTU (123 mg, 0.324 mmol) and 6-methyl-3-pyridinecarboxylic acid (44.5 mg, 0.324 mmol) and the reaction mixture was stirred overnight at room temperature. The reaction mixture was evaporated in vacuo, DCM (50 ml) was added and the solution was washed with NfaHCO3 (5 ml×2). The organic layer was dried with dried magnesium sulphate which was removed by filtration and the filtrate evaporated to dryness in vacuo. The residual oil was dissolved in 1:1 MeCN/DMSO (1.8 ml) and purified by MDAP in two batches. The fractions containing the desired product were combined and evaporated to dryness in vacuo. The residue was azeotroped with toluene to remove any remaining water to yield the title compound (86 mg).

Provenance & Evidence