反应详情

To a solution of the title compound from Step B (0.074 g, 0.40 mmol) in dichloromethane (2.1 mL) were added the title compound from Step C (0.080 g, 0.44 mmol), HATU (0.168 g, 0.442 mmol), HOAt (0.060 g, 0.44 mmol) and diisopropylethylamine (0.285 mL, 1.61 mmol). The reaction was stirred at room temperature for 1 hour, then diluted with dichloromethane, washed sequentially with water and brine, dried over magnesium sulfate, filtered and concentrated under reduced pressure. Purification by flash chromatography on silica gel (50-100% ethyl acetate in hexanes) provided the title compound: LCMS m/z 330.04 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 8.96 (s, 1 H), 8.90 (d, J=7.2 Hz, 1 H), 8.35 (s, 1 H), 7.66 (br s, 1 H), 7.31 (d, J=10.7 Hz, 1 H), 7.04-7.00 (m, 1 H), 4.31 (br s, 1 H), 2.80 (br s, 1 H), 2.44 (t, J=6.1, 3.1 Hz, 1 H), 1.66 (s, 6 H), 0.78-0.77 (m, 2 H), 0.53-0.51 (m, 2 H).

1. washwashed sequentially with water and brine
2. dry with materialdried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customPurification by flash chromatography on silica gel (50-100% ethyl acetate in hexanes)