Reaktion #68013

Reaktionsgleichung

1-(1,3-dioxolan-2-ylmethyl)-8-methylquinolin-2(1H)-one

trifluoroacetic acid

→

(8-methyl-2-oxoquinolin-1(2H)-yl)acetaldehyde

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITat room temperature for 5 days
2. 2
   SonstigeThe solvent was removed under reduced pressure
3. 3
   workup.ADDITIONthe reaction mixture was added with ethyl acetate
4. 4
   SonstigeThe organic layer was separated
5. 5
   Extraktionthe aqueous layer was extracted with ethyl acetate
6. 6
   Waschenthe resultant solution was washed with an aqueous saturated sodium chloride solution
7. 7
   Trocknendried over anhydrous magnesium sulfate
8. 8
   Sonstigethe solvent was removed under reduced pressure

Vorschrift

To 0.17 g of 1-(1,3-dioxolan-2-ylmethyl)-8-methylquinolin-2(1H)-one, 2 mL of a 90% aqueous trifluoroacetic acid solution was added, and the mixture was stirred at room temperature for 4 days, at 40° C. for 3 days, and at room temperature for 5 days. The solvent was removed under reduced pressure, and the reaction mixture was added with ethyl acetate and an aqueous saturated sodium hydrogen carbonate solution. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layer and the extract were combined, the resultant solution was washed with an aqueous saturated sodium chloride solution, and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure to obtain 0.14 g of a brown oily substance, (8-methyl-2-oxoquinolin-1(2H)-yl)acetaldehyde.

Quelle