反应详情

温度

25 °C

To a stirred solution of 5-hydroxy-2-benzothiazolesulfonamide (2.3 g., 0.01 mole), 4-dimethylaminopyridine (100 mg., catalyst) and triethylamine (1.4 ml., 0.01 mole) in dimethylformamide (20 ml.) is added cyclopentaneacetyl chloride (1.6 g., 0.01 mole). The reaction mixture is stirred at 25° C. for 2 hours, poured into ice water and excess hydrochloric acid and extracted into ether. The organic extract is washed with water and dried over magnesium sulfate. The ether is evaporated and the residue chromatographed on silica gel (130 g. 70-230 mesh) to give 2-sulfamoyl-5-benzothiazolyl cyclopentaneacetate.

1. extractionextracted into ether
2. extractionThe organic extract
3. washis washed with water
4. dry with materialdried over magnesium sulfate
5. customThe ether is evaporated
6. customthe residue chromatographed on silica gel (130 g. 70-230 mesh)