反应详情

温度

90 °C

Nitrogen was bubbled through dioxane (800 mL) for 1 h followed by the addition of 4-chloro-2-(methyloxy)-1-nitrobenzene (61 g, 0.33 mol), 3-pyridinylboronic acid (Boron Molecular, 40 g, 0.33 mmol), dichloro(triphenylphosphine)palladium (10 g, 14 mmol), and degassed aqueous 3 N Na2CO3 (325 mL, 975 mmol). The reaction mixture was stirred with a mechanical stirrer and heated at 90° C. for 3 h. The reaction was cooled and most of the dioxane was removed in vacuo. It was diluted with water and then extracted with Ethyl acetate. Combined organic phases were dried (Mg2SO4), filtered and concentrated. The resultant solid was washed with diethyl ether to afford 4-(3-methoxy-4-nitrophenyl)pyridine (50 g, 66% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 4.05 (s, 3 H), 7.53 (dd, J=8.4, 1.8 Hz, 1 H), 7.69 (d, J=1.8 Hz, 1 H), 7.84 (d, J=6.2 Hz, 2 H), 8.02 (d, J=8.4 Hz, 1 H), 8.72 (d, J=6.2 Hz, 2 H). ESIMS (M+H)+=231.

1. customNitrogen was bubbled through dioxane (800 mL) for 1 h
2. customwas removed in vacuo
3. additionIt was diluted with water
4. extractionextracted with Ethyl acetate
5. dry with materialCombined organic phases were dried (Mg2SO4)
6. filtrationfiltered
7. concentrationconcentrated
8. washThe resultant solid was washed with diethyl ether