Reaktion #456117

Reaktionsgleichung

aluminum chloride

5,8-dichloro-4,4-dimethylthiochroman

acetyl chloride

→

6-acetyl-5,8-dichloro-4,4-dimethylthiochroman

Ausbeute 56.0%

Lösungsmittel

methylene chloride

methylene chloride

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwith cooling with ice
2. 2
   Sonstigeto react at room temperature for 1 hour
3. 3
   SonstigeAfter the completion of the reaction
4. 4
   Extraktionextracted with methylene chloride
5. 5
   WaschenAn organic layer was washed with a saturated sodium chloride aqueous solution
6. 6
   Trocknendried over anhydrous sodium sulfate
7. 7
   workup.DISTILLATIONThe methylene chloride was distilled off under reduced pressure
8. 8
   Sonstigethe resultant oily substance was purified by silica gel column chromatography

Vorschrift

1.26 Grams (9.45 mmol) of anhydrous aluminum chloride was suspended in 10 ml of methylene chloride, and a solution of 0.74 g (9.45 mmol) of acetyl chloride in 5 ml of methylene chloride was dropwise added with cooling with ice. The mixture was stirred until the reaction mixture was homogeneous, then, a solution of 1.95 g (7.88 mmol) of 5,8-dichloro-4,4-dimethylthiochroman in 5 ml of methylene chloride was added, and the mixture was allowed to react at room temperature for 1 hour. After the completion of the reaction, the reaction mixture was poured into ice water and extracted with methylene chloride. An organic layer was washed with a saturated sodium chloride aqueous solution and dried over anhydrous sodium sulfate. The methylene chloride was distilled off under reduced pressure, and the resultant oily substance was purified by silica gel column chromatography to give 1.27 g (yield 56%) of 6-acetyl-5,8-dichloro-4,4-dimethylthiochroman.

Quelle