反应详情

In 10 mL of dichloromethane, were dissolved 490 mg of 3-(2,6-dichlorophenyl)-4-hydroxy-1,2,5-thiadiazole, and 210 mg of bis(trichloromethyl) carbonate. Thereto, 170 mg of pyridine was added. The mixture was stirred at room temperature for 12 hours. Thereto, 340 mg of 4-(methylamino)butyric acid hydrochloride, and 570 mg of N,N-diisopropylethylamine were added. The mixture was stirred at room temperature for 12 hours. The reaction mixture was poured into water, and was extracted with dichloromethane. The dichloromethane layer was washed with dilute hydrochloric acid, and water successively, dried over anhydrous magnesium sulfate, and concentrated. The concentrate was purified by silica gel column chromatography to obtain 510 mg of N-(3-carboxypropyl)-N-methyl [3-(2,6-dichlorophenyl)-1,2,5-thiadiazol-4-yl] carbamate.

1. stirringThe mixture was stirred at room temperature for 12 hours
2. extractionwas extracted with dichloromethane
3. washThe dichloromethane layer was washed with dilute hydrochloric acid, and water successively
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated
6. customThe concentrate was purified by silica gel column chromatography