Reaktion #485486

Reaktionsgleichung

1,1,4,4-tetramethyl-6-hexyl-1,2,3,4-tetrahydro-naphthalene

bromine

→

1,1,4,4-tetramethyl-6-hexyl-7-bromo-1,2,3,4-tetrahydro-naphthalene

Ausbeute 100.8%

Lösungsmittel

carbon tetrachloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with ether
2. 2
   Trocknenafter drying over sodium sulphate
3. 3
   Sonstigeevaporated
4. 4
   FiltrationThe crude product was purified by filtration over a silica gel column (eluent hexane/ethyl acetate=9:1)

Vorschrift

10 g of 1,1,4,4-tetramethyl-6-hexyl-1,2,3,4-tetrahydro-naphthalene were dissolved in 100 ml of carbon tetrachloride and, after the addition of a spatula tip of iron powder, treated dropwise at 0° C. with 6.4 g of bromine. After stirring at 0° C. for 3 hours the reaction mixture was poured into ice-water, extracted with ether and, after drying over sodium sulphate, evaporated. The crude product was purified by filtration over a silica gel column (eluent hexane/ethyl acetate=9:1) and gave 13 g of 1,1,4,4-tetramethyl-6-hexyl-7-bromo-1,2,3,4-tetrahydro-naphthalene as a pale yellow oil.

Quelle