N-(7-Formyl-3-(4-isopropylphenyl)-4,6-dimethyl-2,3-dihydro-1-benzofuran-5-yl)-3,3-dimethylbutanamide → N-(7-(1-Hydroxybutyl)-3-(4-isopropylphenyl)-4,6-dimethyl-2,3-dihydro-1-benzofuran-5-yl)-3,3-dimethylbutanamide

Participants

Reaction Steps

To propylmagnesium chloride (2.0 M, THF solution 10.0 mL, 20.0 mmol) was added N-(7-formyl-3-(4-isopropylphenyl)-4,6-dimethyl-2,3-dihydro-1-benzofuran-5-yl)-3,3-dimethylbutanamide (2.2 g, 5.40 mmol) obtained in Example 20 at 0° C. and the reaction solution was stirred at the same temperature for 1 hour. The reaction solution was added to water and the product was extracted with ethyl acetate. The organic layer was washed with water and 1 N hydrochloric acid, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to obtain 627 mg (yield: 26%) of the title compound as a low polarity isomer. Melting point: 162-163° C. (hexane-ethyl acetate).

Provenance & Evidence