反应详情

温度

25 °C

A solution of (S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4,4-difluoro-pentanoic acid (117 mg, 0.34 mmol) and 1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-ylamine (prepared as in Example 49, 82 mg, 0.42 mmol) in N,N-dimethylformamide (3 mL) was treated with N,N-diisopropyethylamine (170 μL, 1.02 mmol) and (benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (225 mg, 0.51 mmol) and stirred overnight at 25° C. After this time, the mixture was diluted with ethyl acetate (25 mL) and washed with a saturated aqueous solution of ammonium chloride (25 mL), saturated aqueous solution of sodium bicarbonate (25 mL) and a saturated aqueous solution of sodium chloride (25 mL) dried over sodium sulfate and concentrated with silica gel (2 g). Purification by Biotage flash chromatography (Aspire 40 g column, 20% ethyl acetate/hexanes) afforded (S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4,4-difluoro-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-yl]-amide (72 mg, 40%) as a white foam: HR-ES-MS m/z calculated for C24H27N4O5ClF2 [M+Na]+ 547.1530, observed 547.1531.

1. washwashed with a saturated aqueous solution of ammonium chloride (25 mL), saturated aqueous solution of sodium bicarbonate (25 mL)
2. dry with materiala saturated aqueous solution of sodium chloride (25 mL) dried over sodium sulfate
3. concentrationconcentrated with silica gel (2 g)
4. customPurification by Biotage flash chromatography (Aspire 40 g column, 20% ethyl acetate/hexanes)