Reaktion #364872

Reaktionsgleichung

bis-(4-t-butylphenyl) sulfoxide

4-t-butylbenzene

trifluoroacetic anhydride

nonafluorobutane sulfonic acid

→

white crystals

Ausbeute 60.2%

tris-(4-t-butylphenyl) sulfonium nonafluorobutane sulfonate

Ausbeute 60.2%

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeequipped with a stirrer
2. 2
   Temperaturwhile the temperature was maintained under ice cooling
3. 3
   workup.ADDITIONAfter completion of the addition
4. 4
   Sonstigewas returned to room temperature
5. 5
   workup.STIRRINGby stirring for additional 15 hours
6. 6
   workup.WAITAfter standing overnight
7. 7
   Sonstigetwo separate phases
8. 8
   Sonstigewere formed
9. 9
   SonstigeThe upper phase was removed
10. 10
    workup.ADDITIONThe oily bottom phase of approximately 150 ml volume was diluted with 800 ml of diethyl ether
11. 11
    Waschenwashed twice with water
12. 12
    TrocknenThe organic phase was dried over MgSO4
13. 13
    SonstigeAfter removal of the solvent
14. 14
    Sonstigea semicrystalline solid was obtained
15. 15
    SonstigeThe semicrystalline solid was recrystallized from diethyl ether

Vorschrift

48.18 g (0.15 mol) of bis-(4-t-butylphenyl) sulfoxide (prepared from diphenyl sulfide and t-butyl bromide via FeCl3 catalyzed alkylation and subsequent oxidation with 2-chlorobenzoic acid) was dissolved in 400 ml of 4-t-butylbenzene in a 1-liter three-neck round-bottom flask equipped with a stirrer, a thermometer, a dropping funnel, a condenser and a nitrogen inlet. The mixture was cooled to 4° C. with vigorous stirring. A solution of 63.0 g (0.30 mol) of trifluoroacetic anhydride and 45.0 g (0.15 mol) of nonafluorobutane sulfonic acid was added dropwise thereto, while the temperature was maintained under ice cooling. After completion of the addition, the mixture was stirred for 1 hour. The temperature was returned to room temperature, followed by stirring for additional 15 hours. After standing overnight, two separate phases were formed. The upper phase was removed and discarded. The oily bottom phase of approximately 150 ml volume was diluted with 800 ml of diethyl ether, and washed twice with water and a sodium bicarbonate solution. The organic phase was dried over MgSO4. After removal of the solvent, a semicrystalline solid was obtained. The semicrystalline solid was recrystallized from diethyl ether. Thus, 66.1 g (60.2%) of white crystals of tris-(4-t-butylphenyl) sulfonium nonafluorobutane sulfonate (m.p. 198-200° C.) was obtained.

Quelle