Potassium Carbonate → (+)-[7-(4-Methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate

Participants

Reaction Steps

Treatment of (±)-(7-bromo-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (11.2 g, 29.22 mmol) with 4-methylphenylboronic acid (5.96 g, 43.84 mmol), dichlorobis(tri-o-tolylphosphine)-palladium(II) (1.15 g, 1.46 mmol), and potassium carbonate (10.10 g, 73.07 mmol) generally according to the procedure described for Intermediate 37 provided 9.8 g (85%) of (±)-[7-(4-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate as a white solid. mp 145-147° C.; Anal. calcd. for C23H22O4S: C, 70.03; H, 5.62. Found: C, 69.91; H, 5.7.

Provenance & Evidence