Reaktion #305196

Reaktionsgleichung

sodium hydroxide

methyl 5-chloropyrazine-2-carboxylate

Ethyl acetate

water

→

title compound

5-ethoxypyrazine-2-carboxylic acid

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe aqueous layer was separated
2. 2
   workup.ADDITIONBrine and ethyl acetate were added to the mixture
3. 3
   Sonstigethe organic layer was separated
4. 4
   TrocknenThe organic layer was dried over anhydrous magnesium sulfate
5. 5
   EinengenThe organic layer was concentrated

Vorschrift

A 5 N sodium hydroxide solution (2 mL) was added to a solution of methyl 5-chloropyrazine-2-carboxylate (150 mg) in ethanol (4 mL), and the mixture was stirred at room temperature for five hours. Ethyl acetate and water were added to the reaction solution, and the aqueous layer was separated. The aqueous layer was made acidic with concentrated hydrochloric acid. Brine and ethyl acetate were added to the mixture, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate. The organic layer was concentrated to obtain the title compound (135 mg).

Quelle