反应详情

A mixture of 3-benzyl-6-chloro-1-[[2'-(N-trityltetrazol-5-yl)biphenyl-4-yl]methyl]pyrimidine-2,4(1H,3H)-dione (0.5 g), tert-butylmercaptan (0.1 ml) and potassium carbonate (0.14 g) in acetonitrile (10 ml) was heated under reflux for 8 hours with stirring. The reaction mixture was allowed to cool and the precipitate was removed by filtration. The filtrate was concentrated to dryness. The resulting residue was dissolved in methanol (15 ml) and 1N hydrochloric acid (1 ml) and the mixture was stirred at room temperature for 4 hours. The reaction mixture was concentrated to dryness and then the residue was extracted with methylene chloride-water. The organic layer was washed with water, dried, and evaporated to dryness. The resulting residue was purified by column chromatography on silica gel to give pale yellow amorphous powders (0.2 g, 54%).

1. temperaturewas heated
2. temperatureunder reflux for 8 hours
3. temperatureto cool
4. customthe precipitate was removed by filtration
5. concentrationThe filtrate was concentrated to dryness
6. dissolutionThe resulting residue was dissolved in methanol (15 ml)
7. stirring1N hydrochloric acid (1 ml) and the mixture was stirred at room temperature for 4 hours
8. concentrationThe reaction mixture was concentrated to dryness
9. extractionthe residue was extracted with methylene chloride-water
10. washThe organic layer was washed with water
11. customdried
12. customevaporated to dryness
13. customThe resulting residue was purified by column chromatography on silica gel