反应详情

To a solution of 2-(5-{[7-butyl-4-(trans-4-hydroxycyclohexyl)-5-oxo-4,5-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methyl}pyridin-2-yl)benzonitrile (0.48 g) and rhodium acetate (dimer, 0.044 g) in toluene (5 mL) was added dropwise ethyl diazoacetate (0.52 mL), and the mixture was stirred for 5 hr. Ethyl acetate and water were added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and then with saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a pale-yellow amorphous solid (0.26 g, 47%).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with water
3. dry with materialwith saturated brine, dried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customThe residue was purified by silica gel column chromatography