反应详情

Thiosalicylic acid (1.28 g, 8.3 mmol) was suspended in tetrahydrofuran (10 ml). While stirring, pyridine (1.64 g, 21 mmol) and then a tetrahydrofuran solution (5 ml) of 4-(acetylamino)benzoyl chloride (1.67 g, 9.1 mmol) were dropwise added to the suspension under ice cooling. After the reaction mixture was stirred for 15 hours, the mixture was diluted with water and 6N hydrochloric acid was added thereto to make its liquid property acidic. The mixture was extracted (50 ml×2) with ethyl acetate. The extract was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was removed by distillation and the residue was recrystallized from ethyl acetate-isopropyl ether to give the title compound (1.38 g, 53%).

1. stirringAfter the reaction mixture was stirred for 15 hours
2. additionwas added
3. extractionThe mixture was extracted (50 ml×2) with ethyl acetate
4. washThe extract was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe solvent was removed by distillation
7. customthe residue was recrystallized from ethyl acetate-isopropyl ether