5-(2-甲基苯基)呋喃-2-甲醛

反应条件: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: As illustrated in Scheme 1, to a mixture of 5-bromo-2-furaldehyde (2.0 g, 11.4 mmol), tetrabutylammonium bromide (3.7 g, 11.4 mmol), potassium carbonate (3.93 g, 28.5 mmol), 2-methylphenyl boronic acid (1.7 g, 12.5 mmol) and palladium (II) acetate (55.2 mg, 0.23 mmol) is added water (20 mL). The reaction mixture is then stirred vigorously for 16 hour at 25° C. Once complete, the reaction mixture is poured into a separatory funnel and diluted with water (50 mL) and ethyl acetate (150 mL). The organic layer is separated and treated with 5.0 g of activated charcoal for 30 min after which time the suspension is filtered through a pad of celite and the filtrate concentrated to afford the crude coupling product as a yellow oil. The crude product is purified by column chromatography (5→10% ethyl acetate in hexanes) to afford 1.8 g of 5-(2′-methylphenyl)-2-furaldehyde. Once complete, the reaction mixture is poured into a separatory funnel The organic layer is separated treated with 5.0 g of activated charcoal for 30 min after which time the suspension is filtered through a pad of celite the filtrate concentrated to afford the crude coupling product as a yellow oil The crude product is purified by column chromatography (5→10% ethyl acetate in hexanes)