反应详情

温度

60 °C

To a mixture of 4-((S)-2-hydroxy-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde (16.5 g, 73 mmol) and (2,4-difluorophenoxy)acetic acid methyl ester (29.4 g, 145 mmol) in anhydrous dimethyl formamide (300 mL) was added potassium carbonate (30 g, 218 mmol). The reaction mixture was heated to 60° C. and after 18 hours, the reaction mixture was cooled and the dimethylformamide was distilled off under vacuum. Crude residue suspended in water (300 mL) and extracted with dichloromethane, washed with brine and dried over magnesium sulfate. Filtered and concentrated under vacuum to give 41 g crude material which was chromatographed on silica gel column eluding with 1% methanol in dichloromethane to give 30 g 6-(2,4-difluorophenoxy)-8-((S)-2-hydroxypropyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one (mass spec M+1=274).

1. temperaturethe reaction mixture was cooled
2. distillationthe dimethylformamide was distilled off under vacuum
3. extractionextracted with dichloromethane
4. washwashed with brine
5. dry with materialdried over magnesium sulfate
6. filtrationFiltered
7. concentrationconcentrated under vacuum
8. customto give 41 g crude material which
9. customwas chromatographed on silica gel column eluding with 1% methanol in dichloromethane