反应详情

In 20 ml of tetrahydrofuran, 1.85 g of 2-(5-carboxymethylthio-4-chloro -2-fluorophenyl)-4,5,6,7-tetrahydro-2H-isoindole-1,3-dione was dissolved, to which 0.97 g of N,N'-carbonyldiimidazole was added and the resultant mixture was stirred for 30 minutes at room temperature. To the resultant mixture, 0.53 g of N,N-diethylhydroxylamine was added, and the resultant mixture was stirred for 2 hours at room temperature. After completion of the reaction, the reaction mixture was poured into a saturated saline solution and extracted with ethyl acetate. The extract was washed with a saturated saline solution, dried with anhydrous magnesium sulfate, and evaporated to remove the solvent under reduced pressure. The residue was purified by silica gel chromatography (eluent; hexane:ethyl acetate=5:1 to 3:1), which afforded 1.60 g of 2-[5-(N,N-diethylaminooxycarbonylmethylthio)-4-chloro-2-fluorophenyl]-4,5,6,7-tetrahydro-2H-isoindole-1,3-dione.

1. additionwas added
2. customAfter completion of the reaction
3. additionthe reaction mixture was poured into a saturated saline solution
4. extractionextracted with ethyl acetate
5. washThe extract was washed with a saturated saline solution
6. dry with materialdried with anhydrous magnesium sulfate
7. customevaporated
8. customto remove the solvent under reduced pressure
9. customThe residue was purified by silica gel chromatography (eluent; hexane:ethyl acetate=5:1 to 3:1), which