Reaktionsgleichung
[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([S:8][CH3:9])[C:3]=1[C:10]1[CH2:14][CH2:13][O:12][N:11]=1.[Br:15]Br>S(=O)(=O)(O)O>[Br:15][C:7]1[C:2]([CH3:1])=[C:3]([C:10]2[CH2:14][CH2:13][O:12][N:11]=2)[C:4]([S:8][CH3:9])=[CH:5][CH:6]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
At 0° C., 10 g (48 mmol) of 3-(2-methyl-6-methylthiophenyl)-4,5-dihydroisoxazole are added a little at a time to 120 ml of conc. sulfuric acid, and the mixture is stirred for about 30 minutes. 3.7 g (23 mmol) of bromine are then added dropwise, and the mixture is stirred at 0° C. for 2.5 hours. The mixture is then allowed to warm to room temperature over a period of about 45 minutes. A homogeneous solution is formed. For work-up, the reaction mixture is poured onto ice-water and extracted three times with methylene chloride. The organic phase is washed with sodium bicarbonate solution, dried with magnesium sulfate and concentrated. This gives 11.4 g of crude product which is used for the next step without further purification.
Aufarbeitung
- stirringthe mixture is stirred at 0° C. for 2.5 hours
- customA homogeneous solution is formed
- additionFor work-up, the reaction mixture is poured onto ice-water
- extractionextracted three times with methylene chloride
- washThe organic phase is washed with sodium bicarbonate solution
- dry with materialdried with magnesium sulfate
- concentrationconcentrated
- customThis gives 11.4 g of crude product which is used for the next step without further purification
Quellen und Nachweise
- ORD-Eintrag
- ord-5108b3698b114fd7bfb7cdaa08da890e
- Quelldatensatz
- uspto-grants-2003_08
- Patentnummer
- US06608209B2
Verknüpfte Notizen
Wird geladen…