Ethanol → HCID 68706411, compound

Participants

Reaction Steps

A mixed solution of 3-(4-bromophenyl)-4,6,7-trimethyl-2,3-dihydro-1-benzofuran obtained in Reference Example 236 (1.0 g, 3.15 mmol), phenylboronic acid (500 mg, 4.10 mmol), tetrakis(triphenylphosphine)palladium(0) (73 mg, 0.063 mmol) in 2 N sodium carbonate aqueous solution (4 mL)-ethanol (4 mL)-toluene (15 mL) was reacted under argon atmosphere at 80° C. for 5 hours. Water was added to the reaction solution, which was extracted with ethyl acetate. The combined organic layer was washed with a saturated brine, was dried over anhydrous sodium sulfate, and then was concentrated under reduced pressure to obtain the residue, which was purified by silica gel column chromatography (ethyl acetate:hexane=1:4) to obtain (3-biphenyl-4-yl)-4,6,7-trimethyl-2,3-dihydro-1-benzofuran 750 mg (yield 76%). Using this compound, 873 mg of the title compound was synthesized in the same manner as in Reference Example 23. Yield 93%. Melting point: 153-154° C. (methanol).

Provenance & Evidence