1,4-Dioxane → HCID 70941642, compound

Participants

Reaction Conditions

Reaction Steps

1,1′-Bis(diphenylphosphino)ferrocene-palladium(II) dichloride-dichloromethane complex (272 mg, 0.33 mmol), 3-methoxycarbonylphenylboronic acid (898 mg, 4.99 mmol), and tripotassium phosphate (1.41 g, 6.64 mmol) were added to a solution of commercially available 5-bromothiophene-2-sulfonamide (805 mg, 3.33 mmol) in mixture of 1,4-dioxane (10 mL) and DMF (1 mL), followed by stirring at 85° C. overnight in an argon atmosphere. The reaction solution was concentrated. A saturated aqueous solution of sodium chloride was added to the residue, followed by extraction with methylene chloride and drying over anhydrous sodium sulfate. The solvent was distilled off, and methanol was added to the residue. The precipitated solid was filtered off. The residue obtained by distilling the solvent off was subjected to purification by silica gel column chromatography to obtain 3-(5-sulfamoyl-2-thienyl)benzoic acid methyl ester (529 mg, 1.78 mmol) (yield: 53%).

Provenance & Evidence