Sodium Bicarbonate → N-(2-chloro-5-(4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)-2,4-difluorobenzamide

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Reaction Steps

A mixture of N-(2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)-2,4-difluorobenzamide (Intermediate 14) (0.100 g, 0.253 mmol), 6-chloro-4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidine (Intermediate 1) (0.074 g, 0.279 mmol), 1N aq. sodium bicarbonate (0.043 g, 0.507 mmol) and PdCl2(dppf)-CH2Cl2 (0.021 g, 0.025 mmol) in dioxane (1.26 ml) was subjected to microwave irradiation for 1 hour at 110° C., and cooled to room temperature. The reaction mixture was filtered through a Celite pad and washed with DCM. The combined organic layers were washed brine, dried over anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by column chromatography on SiO2 (Hex:EtOAc=1:1) to give N-(2-chloro-5-(4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)-2,4-difluorobenzamide (0.020 g, 16%) as a yellow solid. 1H-NMR (CDCl3, Varian 400 MHz) δ 2.05-2.13 (2H, m), 2.23-2.27 (2H, m), 3.70-3.76 (2H, m), 4.11-4.18 (2H, m), 5.65-5.71 (1H, m), 7.00-7.05 (1H, m), 7.10-7.15 (1H, m), 8.25-8.38 (3H, m), 8.84 (1H, s), 8.03 (1H, d, J=2.4 Hz), 9.19-9.24 (1H, m), 9.71 (1H, d, J=2.4 Hz). m/z=498.0 [M+1]+.

Provenance & Evidence