反应详情

(R)-1-[2-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-3-(4-ethyl-phenyl)-7-(4-fluoro-phenylamino)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one (100 mg, 0.18 mmol) (from Example 38f supra) in pyridine (1.5 mL) (Fisher) was treated at room temperature with hydrogen fluoride-pyridine (0.6 mL) (Aldrich) for 15 minutes. The reaction mixture was quenched with 1 N aqueous hydrochloric acid at 0° C., then extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (50% ethyl acetate in hexanes) to give (R)-3-(4-ethyl-phenyl)-7-(4-fluoro-phenylamino)-1-(2-hydroxy-1-methyl-ethyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one as a colorless viscous oil. (Yield 45 mg, 61%).

1. customThe reaction mixture was quenched with 1 N aqueous hydrochloric acid at 0° C.
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by flash chromatography (50% ethyl acetate in hexanes)