Triethylamine → 4-Chloro-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-(2,6-difluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

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A solution of 4-chloro-2-methylsulfinyl-8-(2,6-difluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one (0.75 mmol) in dichloromethane (30 mL) was mixed with a solution of serinol (0.075 g, 0.82 mmol) and Et3N (0.21 mL, 1.5 mmol) in DMF (0.75 mL). The resultant mixture was stirred at room temperature for about 1 hour, then concentrated under vaccum. Flash chromatography (EtOAc:Hexane, 3:1) provided the title compound 4-chloro-8-(2,6-difluorophenyl)-2-{[2-hydroxy-1-(hydroxy-methyl)ethyl]amino}pyrido[2,3-d]pyrimidin-7(8H)-one (42%): LC-MS m/z 383 (M+H)+; 1H-NMR(CDCl3) δ 1.95 (s, br, 2H), 3.90 (m, br, 5H), 6.05 (m, br, 1H), 6.56 (d, J=9.6 Hz, 1H), 7.10 (m, 2H), 7.48 (d, J=8.1 Hz, 2H), 7.94 (d, J=9.6 Hz, 1H).

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