반응 #47287
ord-740c58233cc64e52b71a49e6f4a7df9b
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후처리
- 1세척washed with saturated ammonium chloride, water
- 2건조a saturated sodium chloride solution and dried over sodium sulfate
- 3농축The organic layer was concentrated
- 4기타the crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g, 0% to 100% ethyl acetate/hexanes)
- 5기타to give a waxy material
- 6기타were evaporated
- 7기타The residue was triturated with diethyl ether
- 8여과filtered
실험 절차
A solution of (S)-2-[4-(2-chloro-6-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-3-cyclohexyl-propionic acid (prepared as in Example 67, 200 mg, 0.52 mmol) in dichloromethane (5 mL) was treated with pyrazin-2-ylamine (65 mg, 0.68 mmol), bromotripyrrolidinophosphonium hexafluorophosphate (503 mg, 1.1 mmol) and N,N-diisopropylethylamine (110 mg, 0.85 mmol). The reaction mixture was stirred for 4 h at 25° C., under nitrogen. The reaction mixture was diluted with ethyl acetate, washed with saturated ammonium chloride, water, a saturated sodium chloride solution and dried over sodium sulfate. The organic layer was concentrated, and the crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g, 0% to 100% ethyl acetate/hexanes) to give a waxy material. This material was dissolved in dichloromethane (2 mL). The clear solution was treated with hydrogen chloride in diethyl ether (1M, 4 mL) and solvents were evaporated. The residue was triturated with diethyl ether and filtered to afford (S)-2-[4-(2-chloro-6-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-3-cyclohexyl-N-pyrazin-2-yl-propionamide hydrochloride (28 mg, 33%) as a orange solid: 1H NMR (300 MHz, DMSO-d6) δ ppm 0.77-1.37 (m, 6H) 1.43-1.95 (m, 7H) 4.29 (d, J=18.7 Hz, 1H) 4.64 (d, J=18.7 Hz, 1H) 5.00 (s, 1H) 5.02-5.12 (m, 1H) 7.36-7.57 (m, 3H) 8.38 (d, J=2.4 Hz, 1H) 8.40-8.47 (m, 1H) 9.27 (d, J=1.2 Hz, 1H) 11.20 (s, 1H). HR-ES-MS m/z calculated for C23H24ClFN4O3 459.1594, observed 459.1593 [M+H]+.