反应详情

温度

80 °C

A mixture of N-(4-methoxybenzyl)-4-nitropyridin-2-amine 1-oxide (25.6 g, 0.0929 mol), 7-hydroxy-1,2,3,4-tetrahydronaphthalene-2-carboxylic acid (17 g, 0.088 mol) and cesium carbonate (92 g, 0.28 mol) in DMF (200 mL, 3 mol) was heated with stirring at 80° C. overnight. The reaction mixture was allowed to cool and then concentrated to small volume and 200 ml of water was added. The solution was acidified with conc. HCl to pH=4. The aqueous solution was removed and the remaining organic solution was washed with water (3×). The residue was treated with 1N NaOH (150 ml) and extracted with DCM (3×). The aqueous solution was acidified with conc. HCl. A precipitate formed and was filtered, washed with water (3×), and dried to give 7-({2-[(4-methoxybenzyl)amino]-1-oxidopyridin-4-yl}oxy)-1,2,3,4-tetrahydronaphthalene-2-carboxylic acid (33 g, 89%) as a brown solid. 1H NMR (d6-DMSO, 400 MHz) δ: 12.40 (s, 1H); 8.03 (d, 1H); 7.80 (t, 1H); 7.20 (d, 2H); 7.12 (d, 1H); 6.82 (d, 2H); 6.76 (m, 2H); 6.20 (s, 1H); 6.10 (d, 1H); 4.30 (d, 1H); 3.70 (s, 3H); 2.80 (m, 4H); 2.65 (m, 1H); 2.08 (m, 1H); 1.74 (m, 1H) LCMS ES+ 421.1

1. temperaturewas heated
2. temperatureto cool
3. concentrationconcentrated to small volume and 200 ml of water
4. additionwas added
5. customThe aqueous solution was removed
6. washthe remaining organic solution was washed with water (3×)
7. additionThe residue was treated with 1N NaOH (150 ml)
8. extractionextracted with DCM (3×)
9. customA precipitate formed
10. filtrationwas filtered
11. washwashed with water (3×)
12. customdried