反应详情

Treatment of (±)-(7-bromo-5-fluoro-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (2.00 g, 4.98 mmol) with 2-methylphenyl boronic acid (1.017 g, 7.48 mmol), dichlorobis(tri-o-tolylphosphine)palladium(II) (0.196 g, 0.249 mmol), and potassium carbonate (1.72 g, 12.46 mmol) generally according to the procedure described for Intermediate 37 provided 1.58 g (77%) of (±)-[5-fluoro-7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate as a colorless oil. Rf=0.47 (silica, ethyl acetate:hexanes 3:17); Anal. calcd. for C22H19FO4S.0.2 C4H8O2: C, 66.46; H, 5.30. Found: C, 66.25; H, 4.98.