反应详情

温度

-78 °C

To 4-hydroxy-1-{4-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperazin-1-yl}-4-methyl-pent-2-en-1-one (330 mg, 0.76 mmol) at −78° C. in 3 mL of CH2Cl2 was added (diethylamino)sulfur trifluoride (185 mg, 1.15 mmol). The reaction mixture was stirred −78° C. for 2.5 h. The reaction mixture was diluted with 10 mL of water and 10 mL of CH2Cl2. The organic layer was separated and dried over Na2SO4, and the solvent was removed under reduced pressure to give an oil. The residue was subjected to purification by normal phase LC using 11-100% EtOAc-hexanes to give 4-fluoro-1-{4-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperazin-1-yl}-4-methyl-pent-2-en-1-one (133 mg, 40% yield). LC/MS: m/z 435.4.3 (M+H)+ at 2.92 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

1. customThe organic layer was separated
2. dry with materialdried over Na2SO4
3. customthe solvent was removed under reduced pressure
4. customto give an oil
5. customThe residue was subjected to purification by normal phase LC