反应详情

温度

40 °C

EDC (0.18 g, 0.95 mmol) was added to a suspension of (E)-3-(7-oxo-7,8-dihydro-1,8-naphthyridin-3-yl)acrylic acid hydrochloride (0.20 g, 0.79 mmol), HOBt (0.12 g, 0.87 mmol), Methyl-(3-methyl-benzofuran-2-ylmethyl)-amine (0.15 g, 0.87 mmol) and (i-Pr)2EtN (0.8 mL, 4.74 mmol) in DMF (10 mL). The mixture was heated at 40° C. overnight then diluted with H2O (30 mL) with rapid stirring. The resulting precipitate was filtered, washed with H2O (20 mL) and dried under high vacuum for 4 hours. The solid was suspended in 50% Et2O:hexanes (20 mL), sonicated then filtered and dried under vacuum overnight. Yield: 0.13 g (44.1%) as a mixture of amide rotamers; 1H NMR (300 MHz, DMSO-d6) δ 12.33 (s, 1H), 8.90 and 8.87 (2×s, 1H), 8.53 (s, 1H), 7.91 (d, 111, J=9 Hz), 7.65-7.25 (m, 6H), 6.63 (d, 1H, J=9.0 Hz), 5.04 and 4.83 (2×s, 2H), 3.23 and 2.96 (2×s, 3H), 2.29 (s, 3H); ESI MS m/z 374 [C22H19N3O3+H]+

1. filtrationThe resulting precipitate was filtered
2. washwashed with H2O (20 mL)
3. customdried under high vacuum for 4 hours
4. customhexanes (20 mL), sonicated
5. filtrationthen filtered
6. customdried under vacuum overnight
7. additionYield: 0.13 g (44.1%) as a mixture of amide rotamers