Potassium Phosphate, Tribasic → (+/-)-[7-(3,5-Dichlorophen yl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate

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Reaction Steps

Treatment of (±)-(7-{[(trifluoromethyl)sulfonyl]oxy}-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (1.5 g, 3.32 mmol) with 3,5-dichlorophenylboronic acid (0.95 g, 4.97 mmol), tetrakis(triphenylphosphine)palladium(0) (0.38 g, 0.33 mmol), and potassium phosphate (1.41 g, 6.64 mmol) generally according to the procedure described for Intermediate 50 provided 0.22 g (15%) of (±)-[7-(3,5-dichlorophenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate as a white solid. Rf=0.48 (silica, ethyl acetate:hexanes 1:3); mp 113-115° C.; Anal. calcd. for C22H18Cl2O4S: C, 58.8: H, 4.04. Found: C, 58.73; H, 3.77.

Provenance & Evidence