反应详情

To a solution of 10.65 g of 3-bromophthalide in 100 ml of dimethylformamide is added 12.2 g of potassium 2-(4-isobutylphenyl)propionate under stirring at room temperature. The reaction mixture is stirred 24 hours at room temperature, and then poured into 500 ml of ice water. After extraction with chloroform, the organic phase is washed with an aqueous solution of sodium bicarbonate, then with water and finally dried on anhydrous sodium sulfate and evaporated to dryness. The residue, crystallized from petroleum ether, yields 11.8 g of phthalidyl 2-(4-isobutylphenyl)propionate having the same physico-chemical characteristics of the compound of Example 1.

1. stirringThe reaction mixture is stirred 24 hours at room temperature
2. extractionAfter extraction with chloroform
3. washthe organic phase is washed with an aqueous solution of sodium bicarbonate
4. dry with materialwith water and finally dried on anhydrous sodium sulfate
5. customevaporated to dryness
6. customThe residue, crystallized from petroleum ether