反应详情

Cyclopropylboronic acid (0.504 g), dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine (0.241 g), a 2 M aqueous sodium carbonate solution (5.86 mL), and tris(dibenzylideneacetone)dipalladium(0) (0.251 g) were added to a mixture of methyl 2-bromo-5-ethoxy-2′-fluorobiphenyl-4-carboxylate (1.38 g) and toluene (20 mL), and the resultant mixture was stirred at 100° C. for 6 hours in an argon atmosphere. Water was added to the reaction mixture, and the mixture was filtered through celite. The filtrate was subjected to extraction with ethyl acetate. The organic layer was washed with water and saturated saline and dried over anhydrous magnesium sulfate, and then, the solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate). A THF (5 mL) solution of the purified product was added at 0° C. to a THF (5 mL) suspension of lithium aluminum hydride (0.326 g). After stirring at the same temperature as above for 2 hours, water (0.5 mL), a 1 M aqueous sodium hydroxide solution (0.5 mL), and water (1.5 mL) were added thereto in this order. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain the title compound (1.07 g).

1. filtrationthe mixture was filtered through celite
2. extractionThe filtrate was subjected to extraction with ethyl acetate
3. washThe organic layer was washed with water and saturated saline
4. dry with materialdried over anhydrous magnesium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate)
7. additionA THF (5 mL) solution of the purified product was added at 0° C. to a THF (5 mL) suspension of lithium aluminum hydride (0.326 g)
8. additiona 1 M aqueous sodium hydroxide solution (0.5 mL), and water (1.5 mL) were added
9. filtrationThe reaction mixture was filtered
10. concentrationthe filtrate was concentrated under reduced pressure
11. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate)