Triethylamine → 2-[4-[(3R)-3-Methyl-4-(2-thienylsulfonyl)piperazino]phenyl]-1,1,1,3,3,3-hexafluoro-2-propanol

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Reaction Steps

A 100 mL round-bottomed flask was charged with 1,1,1,3,3,3-hexafluoro-2-(4-((3R)-3-methyl-1-piperazinyl)phenyl)-2-propanol (0.950 g, 2.78 mmol), 5 mL of CH2Cl2, 2-thiophenesulfonyl chloride (0.583 g, 3.19 mmol, Sigma-Aldrich, St. Louis, Mo.), and triethylamine (0.580 mL, 4.16 mmol). After 1 h at room temperature, 0.010 g of DMAP was added. After an additional 30 min, the mixture was concentrated and purified via column chromatography (80 g of silica, 0 to 40% EtOAc in hexanes) to give 1,1,1,3,3,3-hexafluoro-2-(4-((3R)-3-methyl-4-(2-thiophenylsulfonyl)-1-piperazinyl)phenyl)-2-propanol (0.425 g) as an off-white solid. 1H NMR (400 MHz, CDCl3) δ=7.70-7.46 (m, 4H), 7.12 (dd, J=3.7, 4.9 Hz, 1H), 6.94 (d, J=9.0 Hz, 2H), 4.30 (m, 1H), 3.83 (td, J=3.0, 13.1 Hz, 1H), 3.66-3.57 (m, 1H), 3.54-3.38 (m, 2H), 3.31 (s, 1H), 3.07 (dd, J=3.5, 12.3 Hz, 1H), 2.95 (dt, J=3.6, 11.6 Hz, 1H), 1.30 (d, J=6.7 Hz, 3H). m/z (ESI, +ve ion) 488.7 (M+H)+. GK-GKRP EC50 (NADPH-coupled)=2.36 μM; GK-GKRP EC50 (LC MS/MS)=2.57 μM.

Provenance & Evidence