反应详情

To a solution of 4-(dimethylamino)-1,1-dimethoxybut-3-en-2-one (2.0 g, 11.5 mmol) in ethanol was added cyclobutanecarboximidamide hydrochloride (3.0 g, 22.3 mmol) and triethylamine (2.33 g, 23.0 mmol) under nitrogen at room temperature. The reaction mixture was refluxed for 16 h. The solvent was removed under reduced pressure. To the residue was added water and the mixture was extracted with ethyl acetate. The combined organics were dried over sodium sulfate and concentrated under reduced pressure. The crude material was purified via column chromatography to afford 2-cyclobutyl-4-(dimethoxymethyl)pyrimidine as a colorless liquid (300 mg, 12%). MS (ES+APCI) (M+H) 209.2; LCMS retention time: 3.257 minutes (Method J).

1. temperatureThe reaction mixture was refluxed for 16 h
2. customThe solvent was removed under reduced pressure
3. additionTo the residue was added water
4. extractionthe mixture was extracted with ethyl acetate
5. dry with materialThe combined organics were dried over sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe crude material was purified via column chromatography