反应详情

Under nitrogen, 0.50 g (1.9 mmol) of 3-cyclopropylamino-2-methyl-4-(methylsulfonyl)benzoic acid, 0.24 g (2.4 mmol) of 5-hydroxy-1-methylpyrazole and 0.43 g (2.2 mmol) of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride were dissolved in dry CH3CN. The mixture was stirred at RT for 5 h. 0.52 ml (3.7 mmol) of NEt3, 0.10 ml (0.7 mmol) of Me3SiCN and a spatula tip of KCN were added, and the mixture was stirred at RT for 1 day. The solvent was removed under reduced pressure, and the residue was taken up in CH2Cl2 and 10% strength H2SO4. The aqueous phase was extracted with CH2Cl2. The organic phases were dried over MgSO4, and the solvent was removed under reduced pressure. The residue was purified by preparative HPLC. This gave 0.19 g of a beige solid of a purity of 90%.

1. stirringthe mixture was stirred at RT for 1 day
2. customThe solvent was removed under reduced pressure
3. extractionThe aqueous phase was extracted with CH2Cl2
4. dry with materialThe organic phases were dried over MgSO4
5. customthe solvent was removed under reduced pressure
6. customThe residue was purified by preparative HPLC