反应详情

温度

90 °C

KOtBu (1.016 g, 9.05 mmol) was added to a solution of 4-amino-2-chlorophenol (1.00 g, 6.97 mmol) in DMF (35 mL) at RT and stirred 45 min. 2,4-Dichloropyridine (1.340 g, 9.05 mmol) was then added and the reaction was heated at 90° C. overnight. The mixture was cooled to RT, diluted with H2O and EtOAc, the layers separated and the aqueous layer was extracted with EtOAc (3×). The combined organics were washed with H2O (1×), then brine (2×), dried over MgSO4, concentrated in vacuo and purified by silica gel chromatography (EtOAc/Hex) to afford 3-chloro-4-(2-chloropyridin-4-yloxy)benzenamine (0.89 g, 50%) as a waxy yellow solid. 1H NMR (400 MHz, DMSO-d6): δ 8.24 (d, J=5.7 Hz, 1 H), 7.02 (d, J=8.7 Hz, 1 H), 6.87-6.82 (m, 2 H), 6.73-6.72 (m, 1 H), 6.58-6.56 (m, 1 H), 5.50 (br s, 2H); MS (ESI) m/z: 254.9 (M+H+); 256.9 (M+2+H+).

1. temperatureThe mixture was cooled to RT
2. customthe layers separated
3. extractionthe aqueous layer was extracted with EtOAc (3×)
4. washThe combined organics were washed with H2O (1×)
5. dry with materialbrine (2×), dried over MgSO4
6. concentrationconcentrated in vacuo
7. custompurified by silica gel chromatography (EtOAc/Hex)