反应详情

温度

0 °C

To a solution of methyl 5-methyl-2-furancarboxylate (1.5 g, 10.70 mmol) and aluminum trichloride (2.14 g, 16.06 mmol) in chloroform (21 ml) at 0° C. was added bromine (0.77 ml, 14.99 mmol). The resulting solution stirred at 0° C. and warmed to RT over 12 h. This reaction was run in batches (1.5 g and 1 g) and the batches were combined, added to ice and partitioned between H2O-DCM. The aqueous phase was washed several times with DCM and the combined organic fractions were dried over Na2SO4, concentrated and purified by column chromatography (0.5-10% EtOAc in hexanes) affording the title compound (2.1 g, 54%) as a white solid; LCMS (ES) m/z=219, 221 (M, M+2)+.

1. temperaturewarmed to RT over 12 h
2. additionadded to ice
3. custompartitioned between H2O-DCM
4. washThe aqueous phase was washed several times with DCM
5. dry with materialthe combined organic fractions were dried over Na2SO4
6. concentrationconcentrated
7. custompurified by column chromatography (0.5-10% EtOAc in hexanes)