反应详情

To a solution of benzo[1,3]dioxol-5-yl-acetonitrile (0.50 g, 3.1 mmol) in CH2Cl2 (15 mL) was added dropwise BBr3 (0.78 g, 3.1 mmol) at −78° C. under N2. The mixture was slowly warmed to room temperature and stirred overnight. H2O (10 mL) was added to quench the reaction and the CH2Cl2 layer was separated. The aqueous phase was extracted with CH2Cl2 (2×7 mL). The combined organics were washed with brine, dried over Na2SO4 and purified by column chromatography on silica gel (petroleum ether/ethyl acetate 5:1) to give (3,4-dihydroxy-phenyl)-acetonitrile (0.25 g, 54%) as a white solid. 1H NMR (DMSO-d6, 400 MHz) δ 9.07 (s, 1H), 8.95 (s, 1H), 6.68-6.70 (m, 2H), 6.55 (dd, J=8.0, 2.0 Hz, 1H), 3.32 (s, 2H).

1. customto quench
2. customthe reaction
3. customthe CH2Cl2 layer was separated
4. extractionThe aqueous phase was extracted with CH2Cl2 (2×7 mL)
5. washThe combined organics were washed with brine
6. dry with materialdried over Na2SO4
7. custompurified by column chromatography on silica gel (petroleum ether/ethyl acetate 5:1)