Dimethylformamide → 3-Chloro-4-{8-ethyl-2-[4-(4-methyl-piperazin-1-yl)-phenylamino]-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-6-yl}benzoic acid methyl ester

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반응 단계

6-Bromo-8-ethyl-2-[4-(4-methyl-piperazin-1-yl)-phenylamino]-8H-pyrido[2,3-d]pyrimidin-7-one (5, 110 mg, 0.25 mmol), 2-chloro-4-(methoxycarbonyl)benzene boronic acid (58 mg, 0.27 mmol), K3PO4 (58 mg, 0.27 mmol) and PdCl2(dppf) (20 mg, 0.02 mmol) were mixed under argon in a degassed mixture of dimethylformamide and water (20:1, 4.5 mL). The resulting suspension was irradiated for 30 min at 140° C. in a microwave reactor. The reaction mixture was evaporated and the residue was purified by column chromatography, eluting with dichloromethane:methanol (95:5). The title compound (78 mg, 0.15 mmol, 60%) was obtained as a yellow solid. ESMS m/z 533 (M+H)+; 1H NMR (400 MHz, CDCl3) δ ppm 8.55 (s, 1H) 8.15 (d, J=1.5 Hz, 1H) 7.97 (dd, J=7.9, 1.5 Hz, 1H) 7.51-7.64 (m, 3H) 7.48 (d, J=7.8 Hz, 1H) 7.27 (br. s., 1H) 6.97 (d, J=9.0 Hz, 2H) 4.49 (q, J=7.3 Hz, 2H) 3.95 (s, 3H) 3.18-3.35 (m, 4H) 2.67 (br. s., 4H) 2.42 (br. s., 3H) 1.38 (t, J=7.3 Hz, 3H).

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