Water → Phthalimide

Participants

Reaction Steps

A stirred mixture of 5.1 g (0.025 mole) of 3-methoxy-4-(thien-2-yl)aniline (prepared in Example 4) and 4.1 g (0.03 mole) of phthalic anhydride in 20 ml of glacial acetic acid was heated at reflux for approximately 18 hours. The hot reaction mixture was poured into 700 ml of distilled water forming a precipitate. The precipitate was collected by filtration and the filter cake dissolved in methylene chloride. The methylene chloride solution was washed first with a 10% aqueous potassium carbonate solution and then with an aqueous sodium chloride solution. The washed organic solution was dried over anhydrous sodium sulfate and filtered. The solvent was removed from the filtrate by evaporation under reduced pressure to yield 8.2 g of 2-[4-thien-2-yl)-3-methoxyphenyl]-1H-isoindol-1,3-(2H)-dione as a solid (mp 153°-155° C.).

Provenance & Evidence