Sodium Bicarbonate → N-(2-chloro-5-(4-(3,5-dimethylisoxazol-4-ylamino)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)-2,4-difluorobenzenesulfonamide

Participants

Reaction Steps

A mixture of N-(6-chloropyrido[3,2-d]pyrimidin-4-yl)-3,5-dimethylisoxazol-4-amine (Intermediate 21) (0.040 g, 0.145 mmol), N-(2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-3-yl)-2,4-difluorobenzenesulfonamide (Intermediate 3) (0.069 g, 0.160 mmol), PdCl2(dppf)-CH2Cl2Adduct (0.012 g, 0.015 μmol) and 1 N aq. sodium bicarbonate (0.290 ml, 0.290 mmol) in dioxane (1.40 ml) subjected to microwave irradiation for 1 hour at 110° C. After cooling to room temperature, the reaction mixture was filtered through Celite and washed with CH2Cl2. The filtrate was concentrated in vacuo. The residue was purified by column chromatography on SiO2 (Hex:EtOAc=1:1) to give N-(2-chloro-5-(4-(3,5-dimethylisoxazol-4-ylamino)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)-2,4-difluorobenzenesulfonamide (0.021 g, 27%) as a yellow solid. 1H-NMR (CDCl3, Varian 400 MHz) δ 2.30 (3H, s), 2.45 (3H, s), 6.89-7.05 (2H, m), 7.27 (1H, s), 7.79-7.92 (1H, m), 8.20 (1H, d, J=8.8 Hz), 8.26 (1H, s), 8.36 (1H, d, J=8.8 Hz), 8.73 (1H, s), 8.76 (1H, s), 8.89 (1H, s). m/z=544.1 [M+1]+.

Provenance & Evidence