Reaktion #168587

Reaktionsgleichung

isobutyl iodide

6-chloro-3-methylpyrimidine-2,4(1H,3H)-dione

isobutyl iodide

potassium carbonate

→

pure product

Ausbeute 52.0%

6-Chloro-1-isobutyl-3-methylpyrimidine-2,4(1H,3H)-dione

Ausbeute 52.0%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe reaction mixture heated at 50° C. for 24 hours
2. 2
   FiltrationAfter hot filtration
3. 3
   Sonstigethe filtrate is evaporated to dryness under reduced pressure
4. 4
   SonstigeThe obtained oil is further purified by silica-gel flash chromatography

Vorschrift

A mixture of 6-chloro-3-methylpyrimidine-2,4(1H,3H)-dione (3 g, 18.8 mmol), isobutyl iodide (5 mL, 43.5 mmol) and potassium carbonate (5.3 g, 38.4 mmol) in anhydrous DMF (200 mL) is heated at 50° C. for 8 hours. Additional isobutyl iodide (4.3 mL, 37.5 mmol) is added, and the reaction mixture heated at 50° C. for 24 hours. After hot filtration, the filtrate is evaporated to dryness under reduced pressure. The obtained oil is further purified by silica-gel flash chromatography to give 2.1 g of pure product (Yield: 52%).

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