反应详情

To an ice-cooled solution of KOtBu (43.0 g, 384 mmol) in anhydrous THF (300 ml) stirred under nitrogen was added methyl formate (18.43 g, 307 mmol) and methyl 3-(pyrimidin-5-yl)propanoate (25.5 g, 153 mmol) in anhydrous THF (10 mL) dropwise for 1 h. The mixture was stirred for 3 hr. The solvent was removed, and the residue was dissolved in water (150 mL). The aqueous phase was washed with ether (200 mL×3), and then to the aqueous solution was added AcOH to adjust the pH=5. The solid was collected and dried to give the target compound. The filtrate was extracted with DCM (200 mL×2), and the combined organic phase was dried over sodium sulfate, filtered and concentrated. The two crops were combined to give the title product as a yellow solid (18 g, 57.4% yield). LCMS: rt=0.96 min, [M+H+]=195

1. stirringThe mixture was stirred for 3 hr
2. customThe solvent was removed
3. dissolutionthe residue was dissolved in water (150 mL)
4. washThe aqueous phase was washed with ether (200 mL×3)
5. additionto the aqueous solution was added AcOH
6. customThe solid was collected
7. customdried
8. customto give the target compound
9. extractionThe filtrate was extracted with DCM (200 mL×2)
10. dry with materialthe combined organic phase was dried over sodium sulfate
11. filtrationfiltered
12. concentrationconcentrated