Réaction #155355

Équation de réaction

sodium bicarbonate

Benzyloxyacetyl chloride

4-(tert-butyldimethylsilyloxy)-5-fluoro-3-(4-methoxyphenyl)-8-propoxy-quinolin

→

1-(2-benzyloxyacetyl)-5-fluoro -3-(4-methoxyphenyl)-8-propoxy-1H-quinolin-4-one

Rendement 15.0%

Solvants

dichloromethane

Conditions de réaction

Traitement

1. 1
   Températurecooling
2. 2
   Extractionfollowed by extraction
3. 3
   SéchageThe thus-obtained organic layer was dried over sodium sulfate
4. 4
   Concentrationconcentrated under reduced pressure
5. 5
   AutreThe residue was purified
6. 6
   ConcentrationThe purified product was concentrated under reduced pressure

Mode opératoire

Benzyloxyacetyl chloride (1.9 ml, 3 equivalent weight) was added to a dichloromethane solution (50 ml) of 4-(tert-butyldimethylsilyloxy)-5-fluoro-3-(4-methoxyphenyl)-8-propoxy-quinolin (1.5 g, 3.4 mmol) while ice-cooling and the mixture was stirred overnight at room temperature. An aqueous sodium bicarbonate solution was added to the reaction mixture, followed by extraction using ethyl acetate. The thus-obtained organic layer was dried over sodium sulfate, and then concentrated under reduced pressure. The residue was purified using silica gel column chromatography (n-hexane:ethyl acetate=2:1). The purified product was concentrated under reduced pressure, giving a colorless oily substance of 1-(2-benzyloxyacetyl)-5-fluoro -3-(4-methoxyphenyl)-8-propoxy-1H-quinolin-4-one (250 mg, yield: 15%).

Source