Butanoic acid, 2-(ethoxymethylene)-3-oxo-, ethyl ester → Ethyl-2-methylthio-4-methyl-5-pyrimidine carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To 100 ml of N,N-dimethylformamide, 18.6 g (100 mmol) of ethyl 2-acetyl-3-ethoxyacrylate, 13.9 g (50 mmol) of sulfuric acid methylisothiourea and 8.2 g (100 mmol) of sodium acetate were suspended, followed by stirring at 80° C. for 4 hours. The reaction liquid was cooled and then poured in ice water. The crystal precipitated was filtered, washed with water and dried to obtain 18.6 g (yield: 88%) of ethyl 4-methyl-2-(methylthio)pyrimidine-5-carboxylate.

Herkunft & Nachweise