1,2-Dimethoxyethane → HCID 86612346, compound

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Reaction Steps

A mixture of (7-bromo-3-(4-isopropylphenyl)-4,6-dimethyl-2,3-dihydro-1-benzofuran-5-yl)formamide obtained in Example 59 (1.0 g, 2.58 mmol), phenylboronic acid (345 mg, 2.83 mmol) and tetrakis(triphenylphosphine)palladium (99 mg, 0.086 mmol) in 2 N sodium carbonate aqueous solution (30 mL)-1,2-dimethoxyethane (15 mL) was heated under reflux under nitrogen atmosphere for 16 hours. The reaction solution was diluted with ethyl acetate, the insolubles were taken by filtration, and the filtrate was washed with a saturated brine and then dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to give the crude product of (3-(4-isopropylphenyl)-4,6-dimethyl-7-phenyl-2,3-dihydro-1-benzofuran-5-yl)formamide. This compound was dissolved in methanol (18 mL), to which concentrated hydrochloric acid (6 mL) was added, and the mixture was heated under reflux for 2 hours. The solvent was distilled off under reduced pressure and the obtained residue was neutralized with a 12 N aqueous sodium hydroxide solution. The product was extracted with ethyl acetate. The extract was washed with water, dried over magnesium sulfate, and then concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:4) to obtain 642 mg (yield 70%) of the title compound. Melting point: 101-102° C. (hexane-ethyl acetate).

Provenance & Evidence