Potassium Carbonate → 4-(2-Methylsulfanyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-(2,6-difluorophenyl)-8h-pyrido[2,3-d]pyrimidin-7-one

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A solution of 4-Chloro-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-(2,6-difluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one (50 mg, 0.13 mmol) in dioxane/H2O (3:1, 4.8 mL) was mixed with 2-methylthiophenyl boronic acid (33.8 mg, 0.20 mmol) and K2CO3 (54.3 mg, 0.39 mmol). The resultant mixture was bubbled with argon for 5 minutes, and added by Pd(PPh3)4 (3.0 mg, 0.0026 mmol). The reaction tube was sealed and heated with “Smith Creator” (microwave, 150° C.) for 15 minutes. The mixture was concentrated under vaco. Flash chromatography (EtOAc/Hexane, 3:1) then provided the title compound (89%): MS (ES) m/z 471 (M+H)+; 1H-NMR(CDCl3) δ 2.45 (s, 3H), 2.55 (s, br, 2H), 3.72 (m, br, 5H), 6.25 (m, br, 1H), 6.41 (m, 1H), 7.11 (m, 2H), 7.30 (m, 2H), 7.45 (m, 2H), 7.51 (m, 2H).

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