反应详情

Ether 110 (379 mg, 1.21 mmol) was treated with 1.25M HCl in MeOH (11 mL) and the mixture was stirred at room temperature for 12 h, and then at 53° C. for 2 h. The resulting cooled solution was diluted with water (50 mL) and extracted with CH2Cl2 (5×50 mL). The combined extracts were evaporated to dryness and the residue was triturated in pentane to give 2-[4-(trifluoromethoxy)phenyl]-5-pyrimidinol (112) (305 mg, 99%) as a white solid: mp (pentane) 156-157° C.; 1H NMR (CDCl3) δ 8.45 (s, 2H), 8.38 (dt, J=8.9, 2.4 Hz, 2H), 7.29 (br dd, J=8.9, 0.7 Hz, 2H), 5.60 (br s, 1H); HRESIMS calcd for C11H8F3N2O2 m/z [M+H]+ 257.0532. found 257.0526.

1. waitat 53° C. for 2 h
2. temperatureThe resulting cooled solution
3. extractionextracted with CH2Cl2 (5×50 mL)
4. customThe combined extracts were evaporated to dryness
5. customthe residue was triturated in pentane