Potassium Carbonate → 4-Methyl-5-[[2-(1-methyl-1h-pyrazol-4-yl)-4-pyridinyl]oxy]-2-nitropyridine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 5-((2-chloropyridin-4-yl)oxy)-4-methyl-2-nitropyridine (1.5 g, 5.65 mmol) and 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (1.527 g, 7.34 mmol) in dioxane (20 mL) was sparged with Ar, treated with a solution of K2CO3 (1.171 g, 8.47 mmol) in water (5 mL) and Pd(PPh3)4 (0.326 g, 0.282 mmol) and heated at 80° C. overnight. The mixture was cooled to RT, treated with water, extracted with DCM (4×) and the combined organics were dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (MeOH/DCM) to afford 4-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)-2-nitropyridine (2.3 g, 75%). 1H NMR (400 MHz, DMSO-d6): δ 8.48 (s, 1H), 8.43-8.42 (m, 2H), 8.27 (s, 1H), 7.98 (s, 1H), 7.30 (d, J=2.4 Hz, 1H), 6.83 (dd, J=5.7, 2.4 Hz, 1H), 3.84 (s, 3H), 2.34 (s, 3H); MS (ESI) m/z: 312.1 (M+H+).

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