反应详情

To a solution of N-(isoxazol-3-yl)-N-(4-methoxybenzyl)-2-oxo-1-(2,3′,5′-trifluoro-5-hydroxy-[1,1′-biphenyl]-4-yl)-1,2-dihydroquinoline-6-sulfonamide (39.3 mg, 0.062 mmol) in DCM (620 μl) at room temperature was added trifluoromethanesulfonic acid (16.52 μl, 0.186 mmol). The resulting solution was stirred for 1 hour. The solution was then dissolved in 1.5 ml of DMSO and passed through a 0.20 micron filter. An additional 0.5 ml was used to sinse the reaction vial and the solution was passed through the same filter. The resulting DMSO solution was purified by reverse-phase HPLC (Waters XBridge Prep Shield RP18 10 μm OBD 19×100 mm) gradient, 5 to 50% MeCN in water (containing 0.1% ammonium hydroxide as an additive), flow rate 40 mL/min to yield N-(isoxazol-3-yl)-2-oxo-1-(2,3′,5′-trifluoro-5-hydroxy-[1,1′-biphenyl]-4-yl)-1,2-dihydroquinoline-6-sulfonamide (10.2 mgs, 32% yield over two steps).1H NMR (500 MHz, DMSO-d6) □=ppm 6.37 (s, 1 H) 6.78 (d, J=9.17 Hz, 1 H) 6.83 (d, J=8.45 Hz, 1 H) 7.17 (d, J=7.20 Hz, 1 H) 7.30-7.43 (m, 4 H) 7.84 (dd, J=8.95, 2.01 Hz, 1 H) 8.19 (d, J=7.88 Hz, 1 H) 8.31 (s, J=8.04 Hz, 1 H) 8.59 (s, 1 H) 10.06 (br. s., 1 H). m/z (ESI) 513.9 (M+H)+.

1. filtrationfilter
2. customThe resulting DMSO solution was purified by reverse-phase HPLC (Waters XBridge Prep Shield RP18 10 μm OBD 19×100 mm) gradient, 5 to 50% MeCN in water (
3. additioncontaining 0.1% ammonium hydroxide as an additive), flow rate 40 mL/min