反应详情

A solution of 2.58 g (12.9 mmol) of 7-chloro-5-(methylthio)[1,2,4]triazolo[1,5-c]pyrimidine (Example 51A) is dissolved in 300 ml of methanol, and 28 ml of a 2 molar aqueous potassium hydroxide solution are added. The mixture is heated under reflux for 3 h. After the reaction is complete, the methanol is removed in vacuo, the mixture is neutralized with half-concentrated hydrochloric acid, and the crystals which have separated out are filtered off with suction. They are washed with water and methanol and then dried under high vacuum. 1.82 g (83% of theory) of the product are obtained.

1. temperatureThe mixture is heated
2. temperatureunder reflux for 3 h
3. customthe methanol is removed in vacuo
4. customthe crystals which have separated out
5. filtrationare filtered off with suction
6. washThey are washed with water and methanol
7. customdried under high vacuum
8. custom1.82 g (83% of theory) of the product are obtained