Reacción #481608

Ecuación de reacción

potassium trifluoromethanesulfonate salt

2-oxobutyl-thiacyclohexanium bromide

→

2-oxobutyl-thiacyclohexanium trifluoromethanesulfonate

Rendimiento 75.4%

Disolventes

acetonitrile

acetonitrile

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroTo the solution, a solution prepared
2. 2
   workup.ADDITIONwas added dropwise
3. 3
   Otrothe deposited potassium bromide was removed by filtration and acetonitrile
4. 4
   workup.DISTILLATIONwas distilled off under reduced pressure by an evaporator
5. 5
   workup.DISSOLUTIONThe residue was dissolved in chloroform
6. 6
   Otrothe insoluble matter was removed by filtration
7. 7
   workup.DISTILLATIONChloroform in the filtrate was distilled off under reduced pressure
8. 8
   Temperaturaby cooling
9. 9
   OtroThe white crystal was recrystallized from ethyl acetate
10. 10
    Otrodried under reduced pressure at 30° C. for six hours

Procedimiento

In a 300 ml three-necked flask, 2 g of 2-oxobutyl-thiacyclohexanium bromide obtained in Example 1 was dissolved in 10 ml of acetonitrile. To the solution, a solution prepared by dissolving 1.5 g of a potassium trifluoromethanesulfonate salt in 100 ml of acetonitrile was added dropwise. After stirring for three hours, the deposited potassium bromide was removed by filtration and acetonitrile was distilled off under reduced pressure by an evaporator. The residue was dissolved in chloroform and the insoluble matter was removed by filtration. Chloroform in the filtrate was distilled off under reduced pressure and the residue (transparent viscous liquid) was cooled in a refrigerator at −20° C. for three hours. The residue was converted into a white crystal by cooling. The white crystal was recrystallized from ethyl acetate and then dried under reduced pressure at 30° C. for six hours to obtain 1.92 g of 2-oxobutyl-thiacyclohexanium trifluoromethanesulfonate (yield: 75.4%).

Fuente