反应详情

2-Mercapto-4-methylpyrimidine hydrochloride (100 g, 617 mmol), dimethylformamide dimethylacetal (100 mL, 754 mmol), diisopropylethylamine (161 mL, 926 mmol) and toluene (200 mL) were combined under argon. The resulting solution was heated to reflux for 4 h. The solvent was removed in vacuo and water and sodium bisulfate were added. The resulting mixture was extracted with ether (3×100 mL). The combined organic extracts were washed with brine and dried over anhydrous sodium sulfate. The solvent was removed in vacuo to afford an oil. Vacuum distillation gave Compound 2 as a liquid: 70.5 g, (504 mmol, 82%)

1. temperatureThe resulting solution was heated
2. temperatureto reflux for 4 h
3. customThe solvent was removed in vacuo and water and sodium bisulfate
4. additionwere added
5. extractionThe resulting mixture was extracted with ether (3×100 mL)
6. washThe combined organic extracts were washed with brine
7. dry with materialdried over anhydrous sodium sulfate
8. customThe solvent was removed in vacuo
9. customto afford an oil
10. distillationVacuum distillation