Reacción #73048

Ecuación de reacción

tetrahydro-4H-thiopyran-4-one

nitromethane

→

4-(nitromethyl)tetrahydro-2H-thiopyran-4-ol

Rendimiento 42.7%

Disolventes

ethanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Concentraciónconcentrated under reduced pressure
2. 2
   OtroThe residue was partitioned between chloroform (400 mL) and water (60 mL)
3. 3
   ExtracciónThe aqueous was extracted with chloroform (5×100 mL)
4. 4
   SecadoThe combined organics were dried over magnesium sulfate
5. 5
   Filtraciónfiltered
6. 6
   Concentraciónconcentrated under reduced pressure
7. 7
   OtroThe residue was purified by HPFC
8. 8
   Lavadoeluting with a gradient of 3-35% ethyl acetate in hexanes

Procedimiento

Under a nitrogen atmosphere sodium methoxide (1.03 mL of 25 wt % in methanol, 4.51 mmol) was added dropwise to a solution of tetrahydro-4H-thiopyran-4-one (10.48 g, 90.20 mol) and nitromethane (7.33 mL, 135.3 mmol) in ethanol (6 mL). The reaction mixture was stirred at ambient temperature for 5 days and then concentrated under reduced pressure. The residue was partitioned between chloroform (400 mL) and water (60 mL). The aqueous was extracted with chloroform (5×100 mL). The combined organics were dried over magnesium sulfate, filtered, and then concentrated under reduced pressure. The residue was purified by HPFC eluting with a gradient of 3-35% ethyl acetate in hexanes to provide 10.23 g of 4-(nitromethyl)tetrahydro-2H-thiopyran-4-ol.

Fuente