反应详情

A mixture of 583 (500 mg, 2.63 mmol), N-bromosuccinimide (561 mg, 3.15 mmol) and 1,1′-azobis(cyclohexanecarbonitrile) (Vazo) (63 mg, 0.26 mmol) in 15 ml of CCl4 was heated overnight under reflux. The mixture was cooled to room temperature, quenched by adding water and extracted with DCM. The organic layer was washed with brine and dried over MgSO4, filtered and concentrated. The crude residue was purified by column chromatography (30% ethyl acetate/hexane) to afford the title compound 585 (680 mg, 96% yield). 1H NMR: (CDCl3) δ (ppm): 7.79 (s, 1H), 7.70-7.52 (m, 3H), 4.69 (s, 2H), 4.06 (s, 3H), 3.72 (s, 2H). LRMS: 268.2 (Calc.); 269.1 (found).

1. temperaturewas heated overnight
2. temperatureunder reflux
3. customquenched
4. additionby adding water
5. extractionextracted with DCM
6. washThe organic layer was washed with brine
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated
10. customThe crude residue was purified by column chromatography (30% ethyl acetate/hexane)