反应详情

A mixture of tert-butyl 4-((3-(4-methyl-5-(pyridin-3-ylmethylcarbamoyl)-thiophen-2-yl)-2-oxoimidazolidin-1-yl)methyl)phenylcarbamate (0.18 g, 0.34 mmol) and trifluoroacetic acid (2 mL) in dichloromethane (2 mL) was stirred at ambient temperature for 2 h and concentrated. The residue was taken up in saturated aqueous sodium bicarbonate solution (25 mL) and extracted with dichloromethane (2×50 mL). The combined organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with 0-10% methanol in dichloromethane to afford the title compound as a cream solid in 46% yield (0.07 g): mp 118-120° C.; 1H NMR (300 MHz, DMSO-d6) δ 8.52 (s, 1H), 8.44 (s, 1H), 8.30 (t, J=5.9 Hz, 1H), 7.70 (d, J=7.9 Hz, 1H), 7.53 (dd, J=7.9, 4.8 Hz, 1H), 6.93 (d, J=8.4 Hz, 2H), 6.52 (d, J=8.4 Hz, 2H), 6.18 (s, 1H), 5.09 (br s, 2H), 4.38 (d, J=5.9 Hz, 2H), 4.18 (s, 2H), 3.80-3.72 (m, 2H), 3.40-3.32 (m, 2H), 2.36 (s, 3H); 13C NMR (75 MHz, DMSO-d6) δ 162.9, 155.3, 148.8, 148.0, 147.8, 142.7, 139.1, 135.4, 135.0, 128.9, 123.4, 123.0, 119.7, 113.8, 111.8, 46.8, 42.4, 40.9, 15.7; MS (ES+) m/z 422.2 (M+1).

1. concentrationconcentrated
2. extractionextracted with dichloromethane (2×50 mL)
3. dry with materialThe combined organic layer was dried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified by column chromatography
7. washeluted with 0-10% methanol in dichloromethane