Water → HCID 13235942, compound

Participants

Reaction Steps

5.6 g (0.04 mole) of 3-amino-5-t-butylpyrazole prepared in Example 1 was dissolved in 50 ml of acetone, and 4 g of sodium bicarbonate was suspended thereinto. To the suspension was added dropwise 3.7 g of valeryl chloride with stirring. After completion of the dropwise addition, the mixture was further allowed to react at 40° C. for 3 hours. Water was added to the reaction mixture, from which the reaction product was extracted with methylene chloride, followed by the concentration of methylene chloride solution. Thereafter, hexane was added thereto whereby crystals were precipitated. The crystals were collected by filtration and washed with water and benzene to obtain 2.3 g of 5-t-butyl-3-valerylaminopyrazole.

Provenance & Evidence