反应详情

温度

106 °C

To a room temperature suspension of 3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methylpyridin-2(1H)-one (500.0 mg, 1.51 mmol) and Cs2CO3 (1.50 g, 4.60 mmol) in 1-methyl-2-pyrrolidinone (3.0 mL) was added ethyl 6-chloronicotinate (900 mg, 4.85 mmol). The resulting suspension was stirred and heated to 106° C. for 36 hours until complete consumption of starting material by LCMS analysis. The reaction mixture was then diluted with ethyl acetate (400 mL), water washed (3×200 mL). The resulting organic extract was separated, Na2SO4 dried, and concentrated. The resulting dark residue was subjected to SiO2 chromatography with ethyl acetate/hexanes (3:7) to furnish a solid. 1H NMR (400 MHz, d4-MeOH) δ 8.68 (app d, J=2.5 Hz, 1H), 8.39 (dd, J=8.7, 2.3 Hz, 1H), 7.62 (app q, J=8.2 Hz, 1H), 7.15 (d, J=8.6 Hz, 1H), 7.08 (s, 1H), 7.08-6.99 (m, 2H), 5.31 (s, 2H), 4.37 (q, J=7.1 Hz, 2H), 2.43 (s, 3H), 1.37 (t, J=7.1 Hz, 3H); LC/MS C-18 column, tr=3.44 minutes (5 to 95% acetonitrile/water over 5 minutes at 1 ml/min with detection 254 nm, at 50° C.). ES-MS m/z 479 (M+H) ES-HRMS m/z 479.0401 (M+H calcd for C21H18BrF2N2O4 requires 479.0431).

1. washwashed (3×200 mL)
2. extractionThe resulting organic extract
3. customwas separated
4. dry with materialNa2SO4 dried
5. concentrationconcentrated
6. customto furnish a solid