反应详情

To a solution of 5-bromo-1,3-benzodioxole-4-carbaldehyde (0.458 g, 2.00 mmol) in dry dimethoxy-ethane were added Pd(PPh3)4 (5 mol %, 0.10 mmol), 2.5 ml 2M Na2CO3 and 2-formylphenylboronic acid (0.450 g, 3.00 mmol) under argon. The reaction mixture was heated under reflux until the starting material was consumed (monitored by TLC). Then the mixture was poured onto ice-water (30 ml) and the aqueous phase was extracted with dichloromethane (3×30 ml). The combined organic phases were dried over anhydrous MgSO4. The solvent was evaporated in vacuo and the crude product was purified by column chromatography with a mixture of hexane:ethyl acetate (9:1) as the eluent.

1. temperatureThe reaction mixture was heated
2. temperatureunder reflux until the starting material
3. customwas consumed (monitored by TLC)
4. additionThen the mixture was poured onto ice-water (30 ml)
5. extractionthe aqueous phase was extracted with dichloromethane (3×30 ml)
6. dry with materialThe combined organic phases were dried over anhydrous MgSO4
7. customThe solvent was evaporated in vacuo
8. customthe crude product was purified by column chromatography with a mixture of hexane:ethyl acetate (9:1) as the eluent