反应详情

To a solution of (5-fluoro-3-methylbenzo[b]thiophen-2-yl)-N-methylmethanamine (168 mg, 0.8 mmol) in DMF (5 mL) were added in sequential order (E)-3-(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)acrylic acid (159 mg, 0.73 mmol), 1-hydroxybenzotriazole (111 mg, 0.8 mmol), diisopropylethylamine (381 uL, 2.19 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (160 mg, 0.8 mmol). The mixture was stirred at room temperature overnight, cooled in an ice bath and water added with rapid stirring. The product precipitated and was filtered, triturated with ether and dried to yield the title compound as a pale brown solid (224 mg, 75%): 1H NMR (300 MHz, DMSO-d6) δ 10.65 (s, 1H), 8.37 (s, 1H), 8.08 (s, 1H), 7.76-8.00 (m, 1H), 7.39-7.63 (m, 2H), 7.02-7.33 (m, 2H), 4.87-5.11 (rotamers, 2s, 2H), 3.16 (s, 3H), 2.56-2.89 (m, 2H), 2.49-2.51 (m, 2H), 2.39 (s, 3H); MS (ESI) m/e 410 (C22H20FN3O2S+H)+.

1. temperaturecooled in an ice bath
2. customThe product precipitated
3. filtrationwas filtered
4. customtriturated with ether
5. customdried