反应详情

温度

130 °C

Combine 6-chloronicotinamide (4.53 g, 28.9 mmol), 4-hydroxybenzaldehyde (3.5 g, 28.9 mmol), potassium carbonate (6 g, 43.4 mmol), and dimethylformamide (200 mL). Heat the reaction mixture to 130° C. under nitrogen, and stir for 18 h. Dilute the reaction mixture with 200 mL of water, extract with diethyl ether (4×100 mL) and dichloroethane (2×100 mL). Combine the organics, and dry over magnesium sulfate. Filter, and concentrate in vacuo. Adsorb the residue on silica, and purify by Biotage Flash 40L (elute with 50:50 hexanes/ethyl acetate to 100% ethyl acetate) to afford the title compound as a white solid (3.2 g, 46%): 1H NMR (DMSO-d6): 10.0 (s, 1H), 8.59 (d, 1H), 8.26-8.22 (dd, 1H), 7.98-7.95 (m, 2H), 7.10-7.07 (d, 1H), 6.15-5.65 (br m, 2H).

1. extractionextract with diethyl ether (4×100 mL) and dichloroethane (2×100 mL)
2. dry with materialCombine the organics, and dry over magnesium sulfate
3. filtrationFilter
4. concentrationconcentrate in vacuo
5. custompurify by Biotage Flash 40L (elute with 50:50 hexanes/ethyl acetate to 100% ethyl acetate)