反应详情

温度

75 °C

A flask was charged with (S)—N-(5-(pyridin-2-ylthio)-3-(1,3,5-trimethyl-1H-pyrazol-4-yloxy)pyridin-2-yl)-3-(1,4-dioxaspiro[4.5]decan-2-yl)-1,2,4-thiadiazol-5-amine (1.38 g, 2.50 mmol), ethanol (50 mL), and 3M HCl (1.67 ml, 5.00 mmol) and heated to 75° C. for 1 hour. The reaction was cooled to ambient temperature, and saturated aqueous sodium bicarbonate was added slowly. The mixture was extracted with ethyl acetate and dichloromethane. The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified over silica gel (50 to 100% ethyl acetate in hexanes followed 5% methanol in ethyl acetate). The product was dissolved in 10% methanol in dichloromethane and 5 mL 2M HCl in ether was added. The solution was concentrated and dried in a vacuum oven to afford (S)-1-(5-(5-(pyridin-2-ylthio)-3-(1,3,5-trimethyl-1H-pyrazol-4-yloxy)pyridin-2-ylamino)-1,2,4-thiadiazol-3-yl)ethane-1,2-diol hydrochloride (0.958 g, 1.65 mmol, 65.9% yield) as yellow solid. Mass Spectrum (apci) m/z=472.1 (M+H−HCl).

1. temperatureThe reaction was cooled to ambient temperature
2. extractionThe mixture was extracted with ethyl acetate and dichloromethane
3. dry with materialThe combined organic layers were dried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified over silica gel (50 to 100% ethyl acetate in hexanes followed 5% methanol in ethyl acetate)
7. dissolutionThe product was dissolved in 10% methanol in dichloromethane
8. addition5 mL 2M HCl in ether was added
9. concentrationThe solution was concentrated
10. customdried in a vacuum oven