反应详情

温度

110 °C

N,N-dimethyl 6-chloro-5-phenylpyridazin-3-amine (1-2; 120 mg, 0.51 mmol) was dissolved in dry dioxane (3 mL) and 4-formylphenyl boronic acid (136 mg, 0.91 mmol). 2 M aqueous Na2CO3 (0.75 mL) and palladium(0) tetrakis-triphenylphosphine (66 mg, 0.058 mmol) were then added. This mixture was degassed, the vessel sealed and heated at 110° C. for 24 hours. The cooled reaction was diluted with water and the product extracted into ethyl acetate, the extract dried over anhydrous NaSO4, filtered and evaporated. The product was purified by chromatography on silica gel and elution with a 25-65% ethyl acetate/hexane gradient to give 4-[6-(Dimethylamino)-4-phenylpyridazin-3-yl]benzaldehyde (1-3). NMR (CDCl3): δ9.98 (1H, s), 7.74 (2H, d, J=8 Hz), 7.54 (2H, d, J=8 Hz), 7.35 (3H, m), 7.19 (2H, d, J=8 Hz), 6.76 (1H, s), 3.29 (6H, s); m/e (m+1): 304.2

1. customThis mixture was degassed
2. customthe vessel sealed
3. customThe cooled reaction
4. extractionthe product extracted into ethyl acetate
5. dry with materialthe extract dried over anhydrous NaSO4
6. filtrationfiltered
7. customevaporated
8. customThe product was purified by chromatography on silica gel and elution with a 25-65% ethyl acetate/hexane gradient