反応 #167524

反応方程式

ethyl 2-fluoro-3-(((methylthio)carbonothioyl)oxy)-3-(4-propylcyclohexyl)propanoate

di-tert-butylperoxide

dioxane

water

→

ethyl 2-fluoro-3-(4-propylcyclohexyl)propanoate

収率 75.1%

溶媒

ethyl-acetate

反応条件

後処理

1. 1
   温度to heating
2. 2
   温度reflux for 48 hours
3. 3
   温度After cooling the resultant
4. 4
   その他reaction mixture to 25° C.
5. 5
   その他to separate the mixture into an organic layer
6. 6
   その他The resultant organic layer was isolated
7. 7
   洗浄washed with water
8. 8
   乾燥the resultant solution was dried over anhydrous magnesium sulfate
9. 9
   濃縮The resultant solution was concentrated under reduced pressure
10. 10
    その他the resultant residue was purified by a preparative isolation operation by means of column chromatography
11. 11
    乾燥ethyl acetate=9:1 in a volume ratio) as an eluent and silica gel as a filler, the resultant product was dried

実験手順

To a reaction vessel under a nitrogen atmosphere, 2.1 g of ethyl 2-fluoro-3-(((methylthio)carbonothioyl)oxy)-3-(4-propylcyclohexyl)propanoate (e-10), 0.5 ml of di-tert-butylperoxide, 1.2 g of DPPO and 40 ml of dioxane were added, and the resultant mixture was subjected to heating reflux for 48 hours. After cooling the resultant reaction mixture to 25° C., 100 ml of water and 100 ml of ethyl-acetate were added to separate the mixture into an organic layer and an aqueous layer, and an extraction operation was performed. The resultant organic layer was isolated, and washed with water, and then the resultant solution was dried over anhydrous magnesium sulfate. The resultant solution was concentrated under reduced pressure, the resultant residue was purified by a preparative isolation operation by means of column chromatography using a mixed solvent of heptane and ethyl acetate (heptane:ethyl acetate=9:1 in a volume ratio) as an eluent and silica gel as a filler, the resultant product was dried, and thus 1.1 g of ethyl 2-fluoro-3-(4-propylcyclohexyl)propanoate (e-11) was obtained. A yield based on compound (e-10) was 74.5%.

出典