反应详情

A solution of 6-methoxy-isochroman-1-one (15.1 g), NBS (27 g) and benzoyl peroxide (500 mg) in tetrachloromethane (250 mL) was heated for 3 h under reflux, while irradiated with light. The mixture was filtered and the filtrate was concentrated. The residue was dissolved in triethylamine (100 mL) and stirred for 48 h at room temperature. The reaction mixture was distributed between water and ethyl acetate and was adjusted to pH 1 with concentrated hydrochloric acid. The organic phase was separated, dried over magnesium sulfate and concentrated. The residue was chromatographed on silica gel. In this way the product was obtained with molecular weight 176.17 (C10H8O3); MS (ESI): 177 (M+H+).

1. temperatureunder reflux
2. customwhile irradiated with light
3. filtrationThe mixture was filtered
4. concentrationthe filtrate was concentrated
5. dissolutionThe residue was dissolved in triethylamine (100 mL)
6. customThe organic phase was separated
7. dry with materialdried over magnesium sulfate
8. concentrationconcentrated
9. customThe residue was chromatographed on silica gel
10. customIn this way the product was obtained with molecular weight 176.17 (C10H8O3)