反应详情

温度

-70 °C

A 1.2 M solution of DIBALH in toluene (34.6 ml, 41.5 mmol) was added dropwise to a dry-ice cooled solution of 4-(2-methoxy-ethyl)-6-methyl-2-(4-trifluoromethyl-phenyl)-pyrimidine-5-carboxylic acid methyl ester (4.9 g, 13.8 mmol) in tetrahydrofuran (50 ml). The reaction mixture was stirred for 15 min at −70° C., the dry-ice bath was removed and the reaction temperature was allowed to come to RT. The reaction mixture was stirred for 2 h at RT. Under ice-cooling 6 N aqueous HCl (10 ml) was carefully added. After 4 min ether was added, the layers were separated and the organic layer was washed with water, dried over sodium sulfate and concentrated under reduced pressure to give 4.67 g (14.3 mmol, quant.) of crystalline [4-(2-methoxy-ethyl)-6-methyl-2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]-methanol.

1. customthe dry-ice bath was removed
2. customto come to RT
3. stirringThe reaction mixture was stirred for 2 h at RT
4. temperatureUnder ice-cooling 6 N aqueous HCl (10 ml)
5. additionwas carefully added
6. additionAfter 4 min ether was added
7. customthe layers were separated
8. washthe organic layer was washed with water
9. dry with materialdried over sodium sulfate
10. concentrationconcentrated under reduced pressure