Triethylamine → 1,1,1,3,3,3-Hexafluoro-2-(4-(4-(3-thiophenylsulfonyl)-1-piperazinyl)phenyl)-2-propanol

Participants

Reaction Steps

To a solution of 1,1,1,3,3,3-hexafluoro-2-(4-(1-piperazinyl)phenyl)-2-propanol (50 mg, 0.152 mmol, published PCT patent application no. WO 2006/094842) and triethylamine (63.6 μL, 0.457 mmol) in 1,2-dichloroethane (1.5 mL) was added 3-thiophenesulfonyl chloride (1M in dichloroethane, 168 μL, 0.168 mmol, ASDI, Newark, Del.). The reaction was shaken on an orbital shaker for 18 h. The reaction solvent was removed under reduced pressure and the crude product was purified by reverse-phase preparative HPLC using a Sunfire Prep C18 OBD (100×19 mm, 5 μm) column, 0.1% TFA in MeOH/H2O, gradient (65% to 95% over 4.5 min) to provide 1,1,1,3,3,3-hexafluoro-2-(4-(4-(3-thiophenylsulfonyl)-1-piperazinyl)phenyl)-2-propanol. 1H NMR (400 MHz, DMSO-d6) δ 8.35-8.27 (m, 1H), 7.85 (dd, J=5.1, 2.9 Hz, 1H), 7.47 (d, J=8.8 Hz, 2H), 7.37 (d, J=5.1 Hz, 1H), 7.02 (d, J=9.0 Hz, 2H), 3.33-3.28 (m, 4H), 3.07-3.01 (m, 4H). m/z (ESI, +ve ion) 475.1 (M+H)+. GK-GKRP EC50 (NADPH-coupled)=0.597 μM; GK-GKRP EC50 (LC MS/MS)=0.964 μM.

Provenance & Evidence