Reacción #563923

Ecuación de reacción

2-fluoronitrobenzene

4-hydroxytetrahydrothiopyran

sodium hydride

→

2-(tetrahydro-4H-thiopyran-4-yloxy)nitrobenzene

Rendimiento 83.7%

Disolventes

dioxane

dioxane

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.STIRRINGwith stirring for 6 hours
2. 2
   Otrowas returned to room temperature
3. 3
   workup.STIRRINGthe mixture was stirred overnight
4. 4
   Extracciónextracted with ethyl ether
5. 5
   Lavadothe ethyl ether layer was washed, in turn, with water
6. 6
   Secadoa saturated aqueous sodium chloride solution, and dried over anhydrous sodium sulfate
7. 7
   OtroThe solvent was evaporated
8. 8
   Otro1.1 g of the resulting oil was purified by silica gel column chromatography (eluent; n-hexane:ethyl acetate=10:1 )

Procedimiento

To 50 ml of a dioxane suspension containing 0.96 g of 60% sodium hydride was added 3.6 g of 4-hydroxytetrahydrothiopyran at room temperature, and the mixture was stirred on heating at 90° C. with stirring for 6 hours. The temperature of the mixture was returned to room temperature, then 10 ml of a dioxane solution of 4.5 g of 2-fluoronitrobenzene was added dropwise, and the mixture was stirred overnight. The reaction solution was poured into ice water and extracted with ethyl ether, and the ethyl ether layer was washed, in turn, with water and a saturated aqueous sodium chloride solution, and dried over anhydrous sodium sulfate. The solvent was evaporated, and 1.1 g of the resulting oil was purified by silica gel column chromatography (eluent; n-hexane:ethyl acetate=10:1 ) to give 6.1 g of 2-(tetrahydro-4H-thiopyran-4-yloxy)nitrobenzene as a pale yellow oil.

Fuente