反应详情

温度

60 °C

To a mixture of 0.49 g of 2-[(4-acetyl-3-hydroxy-2propylbenzyl)thio]-5-mercapto-1,3,4-thiadiazole, 0.36 g of p-(bromomethyl)benzoic acid, 0.48 g of anhydrous potassium carbonate and 12 ml of 2-butanone was added a catalytic amount of tetra-n-butylammonium bromide followed by stirring at 60° C. for 45 minutes. An aqueous sodium hydroxide solution and ethyl acetate were added to the reaction mixture to fractionate. The aqueous phase was made acidic with 1N hydrochloric acid and extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate, the solvent was distilled off. The thus obtained solid was recrystallized from isopropyl alcohol to give 0.50 g of p-[[5-[(4-acetyl-3-hydroxy-2-propylbenzyl)thio]-1,3,4-thiadiazol-2-yl]thiomethyl]benzoic acid.

1. extractionextracted with ethyl acetate
2. washThe extract was washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationthe solvent was distilled off
5. customThe thus obtained solid was recrystallized from isopropyl alcohol