Reaktion #741392

Reaktionsgleichung

aluminum chloride

1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene

acetyl chloride

→

title compound

5,5,8,8-Tetramethyl-2-acetyl-5,6,7,8-tetrahydronaphthalene

Lösungsmittel

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas cooled under argon in an ice-salt bath
2. 2
   workup.ADDITIONtreated
3. 3
   SonstigeThe cooling bath was removed
4. 4
   Sonstigequenched with ice
5. 5
   SonstigeThe organic layer was separated
6. 6
   Extraktionthe aqueous layer extracted with 2×50 ml methylene chloride
7. 7
   Waschenwashed with water and saturated NaHCO3 solution
8. 8
   Trocknendried (MgSO4)
9. 9
   SonstigeSolvent was removed in-vacuo
10. 10
    workup.DISTILLATIONthe residue distilled by the kugelrohr method (90° C.; 0.45 mm)

Vorschrift

A suspension of 3.45 g (25.9 mmol) aluminum chloride in 15 ml methylene chloride was cooled under argon in an ice-salt bath and treated with stirring with a mixture of 4 g (21.2 mmol) 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene and 1.94 g (24.7 mmol) acetyl chloride via a dropping funnel over a period of thirty minutes. The cooling bath was removed and the mixture stirred for 2 hours, then quenched with ice. The organic layer was separated and the aqueous layer extracted with 2×50 ml methylene chloride. Organic extracts were combined and washed with water and saturated NaHCO3 solution and then dried (MgSO4). Solvent was removed in-vacuo and the residue distilled by the kugelrohr method (90° C.; 0.45 mm) to give the title compound as a colorless oil.

Quelle