反应详情

To a solution of 2-(5-(2-chloro-4-(propylamino)pyrimidin-5-yl)-4-pentyn-1-yl)isoindoline-1,3-dione (K1, 2.0 g) in ethanol (15 mL) and tetrahydrofuran (15 mL), hydrazine monohydrate (2.6 mL) was added at room temperature, and the mixture was stirred at the same temperature for 3 hours and 30 minutes. The reaction mixture was cooled on ice, and then neutralized by adding 1.0 mol/L aqueous hydrochloric acid. The insoluble matter was removed by filtration, and then water and ethyl acetate were added. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layer and the extract were combined, washed with saturated aqueous sodium hydrogencarbonate, and then dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (eluent, 95 to 93% ethyl acetate in methanol) to obtain oily 5-(5-amino-1-pentyn-1-yl)-2-chloro-N-propylpyrimidin-4-amine (K2, 510 mg).

1. temperatureThe reaction mixture was cooled on ice
2. customThe insoluble matter was removed by filtration
3. additionwater and ethyl acetate were added
4. customThe organic layer was separated
5. extractionthe aqueous layer was extracted with ethyl acetate
6. washwashed with saturated aqueous sodium hydrogencarbonate
7. dry with materialdried over anhydrous sodium sulfate
8. customthe solvent was evaporated under reduced pressure
9. customThe obtained residue was purified by basic silica gel column chromatography (eluent, 95 to 93% ethyl acetate in methanol)