反应详情

A mixture of 5-isopropylpyrimidin-2(1H)-one (2.1 g, 15.2 mmol), POCl3 (15 ml), and N,N-dimethylaniline (5 drops) was heated at reflux under a nitrogen atmosphere for 2 h. Upon cooling, the majority of the POCl3 was removed under reduced pressure. The residue was poured into ice water and extracted with chloroform (3×20 ml). The combined organic extracts were washed with brine, dried over MgSO4 and concentrated to provide 2-chloro-5-isopropylpyrimidine as a light brown oil, which was used without further purification.

1. temperaturewas heated
2. temperatureat reflux under a nitrogen atmosphere for 2 h
3. temperatureUpon cooling
4. customthe majority of the POCl3 was removed under reduced pressure
5. additionThe residue was poured into ice water
6. extractionextracted with chloroform (3×20 ml)
7. washThe combined organic extracts were washed with brine
8. dry with materialdried over MgSO4
9. concentrationconcentrated