Potassium Carbonate → HCID 68633300, compound

Participants

Reaction Conditions

Reaction Steps

1.013 g of [(5-bromo-2-methoxyphenethyl)oxy](t-butyl)diphenyl silane, 580 mg of 3-carboxymethylboronic acid, 170 mg of tetrakistriphenyl phosphine palladium and 1.01 g of potassium carbonate were dissolved in 12 ml of toluene, and the mixture was stirred overnight at 90° C. in a nitrogen atmosphere. The reaction mixture was filtered through Celite, the filtrate was concentrated, and then the residue was dissolved in 15 ml of tetrahydrofuran. To this reaction mixture was added 5 ml of tetrabutyl ammonium fluoride solution (1M) in tetrahydrofuran, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate and successively washed with water and brine, dried over anhydrous magnesium sulfate, and the solvent was removed. The residue was purified by a silica gel column, and 197 mg methyl 3-[3-(2-hydroxyethyl)-4-methoxyphenyl]benzoic acid was obtained from a fraction eluted with hexane-ethyl acetate (2:1).

Provenance & Evidence