反应详情

Tris(dibenzylideneacetone)dipalladium(0) (6.65 g) was added to a mixture of ethyl 4′-fluoro-2-propoxy-6-(((trifluoromethyl)sulfonyl)oxy)biphenyl-4-carboxylate (44.6 g), cyclopropylboronic acid (22.3 g), dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine (6.38 g), a 2 M aqueous sodium carbonate solution (156 mL), and toluene (250 mL), and the resultant mixture was stirred at 100° C. for 4 hours in an argon atmosphere. The reaction mixture was allowed to cool to room temperature, followed by extraction with ethyl acetate. The obtained organic layer was washed with 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 chromatography (hexane/ethyl acetate). A THF (150 mL) solution of the obtained purified product was added to a THF (150 mL) suspension of lithium aluminum hydride (3.50 g) under ice cooling in a nitrogen atmosphere. After stirring at the same temperature as above for 30 minutes, water (3.5 mL) and a 15% aqueous sodium hydroxide solution (3.5 mL) were added thereto, and the mixture was stirred for 5 minutes. Then, water (10.5 mL) was further added thereto, and the mixture was stirred for 30 minutes. 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 (29.8 g).

1. extractionfollowed by extraction with ethyl acetate
2. washThe obtained organic layer was washed with saturated saline
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationthe solvent was distilled off under reduced pressure
5. customThe obtained residue was purified by silica gel chromatography (hexane/ethyl acetate)
6. customA THF (150 mL) solution of the obtained purified product
7. additionwas added to a THF (150 mL) suspension of lithium aluminum hydride (3.50 g) under ice cooling in a nitrogen atmosphere
8. additiona 15% aqueous sodium hydroxide solution (3.5 mL) were added
9. stirringthe mixture was stirred for 5 minutes
10. additionThen, water (10.5 mL) was further added
11. stirringthe mixture was stirred for 30 minutes
12. filtrationThe reaction mixture was filtered
13. concentrationthe filtrate was concentrated under reduced pressure
14. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate)