Potassium Carbonate → HCID 17824018, compound

Participants

Reaction Conditions

Reaction Steps

Into a solution. of methyl 7-(3-propoxybenzyl)oxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (650 mg) in THF/methanol (5/2.5 ml) was added at room temperature an aqueous solution (2.1 ml) of potassium carbonate (622 mg), and the resulting mixture was stirred at 60° C. for 24 hours. After cooling to room temperature, the reaction mixture was extracted with ethyl acetate. To the aqueous layer was added 1 N hydrochloric acid (10 ml), and the resulting mixture was extracted with ethyl acetate. The organic layer was washed with an aqueous saturated solution of sodium chloride and was dried with magnesium sulfate. After concentration under reduced pressure, the precipitated crystals were collected by filtration. The crystals were washed with diisopropyl ether to obtain 7-(3-propoxybenzyl)oxy]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylic acid (379 mg) as colorless crystals.

Provenance & Evidence