Potassium Phosphate, Tribasic → 3-(4-Methanesulfonyl-phenoxy)-5-methoxymethoxy-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

After adding 33.4 g (142 mmol) of 4-methanesulfonyl-bromobenzene, 2.67 g (11.9 mmol) of palladium acetate, 5.31 g (17.8 mmol) of 2-(di-tert-butylphosphino)biphenyl and 50.3 g (237 mmol) of potassium phosphate to a solution of 25.0 g (119 mmol) of 5-hydroxy-3-methoxymethoxybenzoic acid methyl ester in toluene (375 ml), the reactor was sealed and the mixture was subsequently stirred at 130° C. for 6 hours. Acetic acid ethyl ester was added to the reaction mixture, which was then filtered and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane:acetic acid ethyl ester=2:1) to obtain 31.0 g of 3-(4-methanesulfonyl-phenoxy)-5-methoxymethoxy-benzoic acid methyl ester (yield: 69%) as a white solid.

Provenance & Evidence