反应详情

温度

0 °C

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.

1. extractionextracted with ether
2. dry with materialafter drying over sodium sulphate
3. customevaporated
4. filtrationThe crude product was purified by filtration over a silica gel column (eluent hexane/ethyl acetate=9:1)