反应详情

A mixture of 2-[3-(2-thienyl)acrylamido]benzoic acid (273 mg, 1 mmol) and triethylamine (0.14 ml, 1 mmol) in dry acetone (10 ml) was stirred at room temperature for 30 minutes. A solution of 3-bromophtalide (213 mg, 1 mmol) in acetone (2 ml) was added under ice cooling, and the mixture was stirred at room temperature for 23 hours. The reaction mixture was filtered by suction, and the solvent was removed from the filtrate. The residue was dissolved in chloroform, washed with saturated aqueous sodium hydrogen carbonate, then with saturated aqueous sodium chloride, and dried over magnesium sulfate. The solvent was removed and the residue was purified by silica gel column chromatography (developing solvent: benzene:ether=49:1). The pale yellow second eluate was collected. After removing the solvent, the resulting oily product was crystallized with isopropyl ether to give the desired compound (159 mg, yield, 39%). m.p., 194°-195° C. (white crystals, recrystallized from benzene-n-hexane)

1. stirringthe mixture was stirred at room temperature for 23 hours
2. filtrationThe reaction mixture was filtered by suction
3. customthe solvent was removed from the filtrate
4. dissolutionThe residue was dissolved in chloroform
5. washwashed with saturated aqueous sodium hydrogen carbonate
6. dry with materialwith saturated aqueous sodium chloride, and dried over magnesium sulfate
7. customThe solvent was removed
8. customthe residue was purified by silica gel column chromatography (developing solvent: benzene:ether=49:1)
9. customThe pale yellow second eluate was collected
10. customAfter removing the solvent
11. customthe resulting oily product was crystallized with isopropyl ether