反应详情

In 3 ml of diethyl ether was dissolved 0.33 g of isopropyl 2-[4-[2-(tert-butoxy)-2-oxoethyl]-8-(3-methylbutylidene)-3-oxo-1-thia-4-azaspiro[4.5]decan-2-yl]-acetate. Then, 1 ml of a 5.39 mol/L solution of dry hydrogen chloride in dioxane was added and the resulting mixture was stirred at the same temperature as above for 2 hours. Further, 1 ml of 5.39 mol/L solution of dry hydrogen chloride in dioxane was added and the resulting mixture was stirred for one hour, after which 3 ml of 5.39 mol/L solution of dry hydrogen chloride in dioxane was added and the resulting mixture was stirred for one hour. The solvent was distilled off under reduced pressure, and the residue was purified by column chromatography [eluent: chloroform]. Then, hexane was added, and the deposited crystal was collected by filtration. Thus, 0.08 g of 2-[2-(2-isopropoxy-2-oxoethyl)-8-(3-methylbutylidene)-3-oxo-1-thia-4-azaspiro[4.5]decan-4-yl]-acetic acid was obtained as a colorless crystalline product.

1. stirringthe resulting mixture was stirred for one hour
2. stirringthe resulting mixture was stirred for one hour
3. distillationThe solvent was distilled off under reduced pressure
4. customthe residue was purified by column chromatography [eluent: chloroform]
5. additionThen, hexane was added
6. filtrationthe deposited crystal was collected by filtration