2,6-Dimethylphenylboronic acid → (+/-)-[4-(2,6-Dimethylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate

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Reaction Steps

Treatment of (±)-(4-bromo-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (1.5 g, 3.32 mmol) with 2,6-dimethylphenylboronic acid (2.35 g, 15.66 mmol), tetrakis(triphenylphosphine)palladium(0) (0.452 g, 0.394 mmol), and barium hydroxide octahydrate (6.17 g, 19.57 mmol) generally according to the procedure described for Intermediate 50 provided 2.27 g (71%) of (±)-[4-(2,6-dimethylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate as a colorless oil. Anal. calcd. for C24H24O4S: C, 70.56; H, 5.92. Found: C, 69.72; H, 5.87.

Provenance & Evidence