反应详情

A solution of 13.15 g (0.05 mol) of 1-cyclohexyl-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-pent-1-en-3-ol (prepared as described in Example II-2) in 50 ml of dioxane was added dropwise to a suspension of 1.5 g of 80% strength sodium hydride in 50 ml of dioxane. After the evolution of hydrogen had ceased, 3.9 g (0.05 mol) of acetyl chloride were added dropwise to the mixture. The mixture was heated under reflux for 4 hours. After the mixture had cooled, the solvent was distilled off in vacuo, and the residue was taken up in methylene chloride and the solution was extracted with water. The organic phase was dried over sodium sulphate and filtered, and the solution was concentrated. The residue was purified over a column (silica gel; methanol: chloroform=1:3). 5.6 g (35.4% of theory) of 3-acetoxy-1-cyclohexyl-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-pent-1-ene were obtained as a slightly yellow oil.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 4 hours
3. temperatureAfter the mixture had cooled
4. distillationthe solvent was distilled off in vacuo
5. extractionthe solution was extracted with water
6. dry with materialThe organic phase was dried over sodium sulphate
7. filtrationfiltered
8. concentrationthe solution was concentrated
9. customThe residue was purified over a column (silica gel; methanol: chloroform=1:3)