Carbon Disulfide → 2-Hexyl-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene

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83 ml of hexylbenzene were treated with 1.8 g of aluminium chloride while cooling with ice. After brief stirring a solution of 40 g of 2,5-dichloro-2,5-dimethyl-hexane in 300 ml of carbon disulphide was added dropwise and the mixture was stirred at 0° C. for a further 2 hours. The reaction mixture was poured into ice/6N hydrochloric acid, extracted with ethyl acetate, dried over sodium sulphate and evaporated. The crude product was distilled in a high vacuum. There were obtained 25.5 g of 1,1,4,4-tetramethyl-6-hexyl-1,2,3,4-tetrahydro-naphthalene as a colourless oil, boiling point 141-152° C./0.8 mm.

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