Sodium Carbonate → 6-(2-chloro-4-methanesulfonyl-phenyl)-8-ethyl-2-[4-(4-methyl-piperazin-1-yl)-phenylamino]-8H-pyrido[2,3-d]pyrimidin-7-one

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Reaction Steps

8-Ethyl-2-[4-(4-methyl-piperazin-1-yl)-phenylamino]-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-6-boronic acid (5, 100 mg, 0.24 mmol), 1-bromo-2-chloro-4-methylsulfonylbenzene (9, 75 mg, 0.28 mmol), sodium carbonate (80 mg, 0.75 mmol) and Pd(PPh3)4 (30 mg, 0.026 mmol) were mixed under argon in a degassed mixture of dimethoxyethane:water (10:1, 2.5 mL). The resulting suspension was irradiated for 30 min at 120° C. in a microwave reactor. After completion, the reaction mixture was evaporated and the residue was purified by column chromatography using dichloromethane:methanol (100:3) as eluent, The crude product was triturated with isopropyl ether (10 mL) and collected. The title compound (49 mg, 0.088 mmol, 37%) was obtained as a yellow solid. ESMS m/z 553 (M+H)+; 1H NMR (400 MHz, CDCl3) δ ppm 8.04 (d, J=2.0 Hz, 1H) 7.86 (d, J=8.3 Hz, 1H) 7.69 (dd, J=8.3, 2.0 Hz, 1H) 3.08 (s, 3H).

Provenance & Evidence