反应详情

N-(4-(4-fluorophenyl)-5-methyl-6-isopropylpyrimidin-2-yl)-N-methylmethanesulfonamide (112.5 mg, 0.33 mmol, 1 equiv.) and N-bromosuccinimide (NBS) (126 mg, 0.72 mmol, 2.1 equiv.) were dissolved in 2 mL of acetonitrile. The mixture was irradiated with light of a wavelength A=310 nm for 4 hours at ambient temperature (about 20° C.). Then, water (10 mL) was added and the mixture was extracted with CH2Cl2 (3×10 mL). The combined organic phases were washed with 10 mL of brine, and the obtained solution was dried with Na2SO4. Solvent was removed under the reduced pressure to give 138.6 mg of crude N-(4-(4-fluorophenyl)-5-(bromomethyl)-6-isopropylpyrimidin-2-yl)-N-methylmethanesulfonamide (II), which contained 93% of N-(4-(4-fluorophenyl)-5-(bromomethyl)-6-isopropylpyrimidin-2-yl)-N-methylmethanesulfonamide (II) as determined by 1H-NMR integral. This product can be further purified by crystallization from MTBE/hexane mixture to afford pure material.

1. customThe mixture was irradiated with light of a wavelength A=310 nm for 4 hours at ambient temperature (about 20° C.)
2. extractionthe mixture was extracted with CH2Cl2 (3×10 mL)
3. washThe combined organic phases were washed with 10 mL of brine
4. dry with materialthe obtained solution was dried with Na2SO4
5. customSolvent was removed under the reduced pressure