HCID 86612349, compound → HCID 23114347, compound

Participants

Reaction Steps

To a solution of ethyl(3-(4-isopropylphenyl)-4,6,7-trimethyl-2,3-dihydro-1-benzofuran-5-yl)oxamate (100 mg, 0.25 mmol) obtained in Example 15 in THF (3 ml) was added dropwise at 0° C. under an argon atmosphere tert-butylmagnesium chloride (2.0 M THF solution, 0.26 mL, 0.5 mmol) and the mixture was stirred for 30 minutes. After the reaction solution was stirred at room temperature for 1 hour, the reaction solution was added to ice and the product was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) and recrystallized from ethyl acetate-hexane to obtain 29 mg (yield: 28%) of the title compound. Melting point: 142-143° C.

Provenance & Evidence