反应详情

2-Methyl-2-thiopseudourea (5 mmol) and ethyl ethoxymethylenecyanoacetate (5 mmol) were dissolved in 20 ml EtOH. To this was added K2CO3 (10 mmol). After the mixture was refluxed for 48 h, it was cooled to room temperature and filtered. The solvent was concentrated in vacuo and purified by column chromatography to give 4-hydroxy-2-(methylthio)pyrimidine-5-carbonitrile in a yield of 65%.

1. temperatureAfter the mixture was refluxed for 48 h
2. filtrationfiltered
3. concentrationThe solvent was concentrated in vacuo
4. custompurified by column chromatography