反应详情

A solution of methyl 5-bromo-2-furancarboxylate (2.5 g, 12.19 mmol), potassium carbonate (8.43 g, 61.0 mmol), bis(tri-t-butylphosphine)palladium(0) (0.312 g, 0.61 mmol) and 2,4,6-trivinylcycloboroxane-pyridine complex (1.47 g, 6.10 mmol) in 1,4-dioxane (50 ml) and water (10 ml) was stirred at 80° C. in a sealed tube for 2 h. The reaction contents were partitioned between H2O-DCM and the aqueous phase was washed several times with DCM. The combined organic fractions were dried over Na2SO4, concentrated and purified via column chromatography (10-50% EtOAc in hexanes) affording methyl 5-ethenyl-2-furancarboxylate (1.3 g, 7.09 mmol, 58% yield) as a yellow oil: LCMS (ES) m/z=153 (M+H)+.

1. customThe reaction contents
2. customwere partitioned between H2O-DCM
3. washthe aqueous phase was washed several times with DCM
4. dry with materialThe combined organic fractions were dried over Na2SO4
5. concentrationconcentrated
6. custompurified via column chromatography (10-50% EtOAc in hexanes)