Reaktion #321498

Reaktionsgleichung

methoxyethoxymethyl chloride

N-(3,4-dimethyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide

sodium hydride

→

colorless oil

Ausbeute 56.4%

N-(methoxyethoxymethyl)-N-(3,4-dimethyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide

Ausbeute 56.4%

Lösungsmittel

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe solution was warmed to room temperature
2. 2
   SonstigeEvaporation of solvent
3. 3
   workup.WAITleft an oil that
4. 4
   Extraktionwas extracted into ethyl acetate
5. 5
   Waschenwashed with brine
6. 6
   Trocknendried over magnesium sulfate
7. 7
   Sonstigeevaporated

Vorschrift

N-(3,4-dimethyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide (680 mg, 2 mmol) in dry THF (2 ml) was added to sodium hydride (121 mg of a 60% oil dispersion, 3 mmol) in dry THF (1 ml). The resulting suspension was cooled to 0° C. and methoxyethoxymethyl chloride (334 mg, 2.68 mmol) was added dropwise via syringe. The solution was warmed to room temperature, and stirring continued overnight. Evaporation of solvent left an oil that was extracted into ethyl acetate, washed with brine, dried over magnesium sulfate and evaporated. Flash chromatography of the residue on silica gel using 10-15% ethylacetate/hexanes yielded 480 mg (56%) of a colorless oil.

Quelle