反应详情

126 g of cesium carbonate were added at room temperature to a solution of 120 g of 5-(4-hydroxybenzyl)-3-triphenylmethylthiazolidine-2,4-dione in 2.5 liters of acetone, followed by 36 ml of methyl bromoacetate, and the resulting mixture was stirred for 1 hour. At the end of this time, the reaction mixture was freed from the solvent by distillation under reduced pressure, and the resulting residue was mixed with water. The aqueous mixture was then extracted with ethyl acetate. The extract was washed with water and then with a saturated aqueous solution of sodium chloride, after which it was dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, after which 1 liter of diethyl ether was added to the oily residue. The mixture was then agitated ultrasonically for 10 minutes. The solid substance precipitated was collected by filtration, to give 126.3 g of the title compound, melting at 158°-162° C.

1. distillationAt the end of this time, the reaction mixture was freed from the solvent by distillation under reduced pressure
2. additionthe resulting residue was mixed with water
3. extractionThe aqueous mixture was then extracted with ethyl acetate
4. washThe extract was washed with water
5. dry with materialwith a saturated aqueous solution of sodium chloride, after which it was dried over anhydrous magnesium sulfate
6. customThe solvent was removed by distillation under reduced pressure
7. additionafter which 1 liter of diethyl ether was added to the oily residue
8. stirringThe mixture was then agitated ultrasonically for 10 minutes
9. customThe solid substance precipitated
10. filtrationwas collected by filtration