Potassium tert-butoxide → 1-[2-(4-Propylcyclohexyl)ethyl]-4-(4-vinylcyclohexyl)benzene

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Reaction Steps

Potassium tert-butoxide (0.86 g, 7.01 mmol) was added slowly with stirring for 3 minutes to 32 ml of solution including methyltriphenylphosphonium bromide (3 g, 8.41 mmol) dissolved in THF. Then, the solution was stirred for 30 minutes at a room temperature and THF solution (25 ml) of 4-{4-[2-(4-propyl-cyclohexyl)ethyl]phenyl}cyclohexane carbaldehyde (2.39 g, 7.01 mmol) was added slowly dropwise to reaction mixture, and then was stirred at a room temperature for 24 hours. The precipitate was filtered under reduced pressure and the filtrate was washed by water (100 ml) and extracted with ether (20 ml×1 time). The aqueous layer was extracted by chloroform (20 ml×3 times). The organic layer was collected, washed by NaCl solution, dried by anhydrous Na2SO4 and concentrated under reduced pressure. The obtained residue was purified by column chromatography (silica gel, hexane, Rf=0.36) and was recrystallized by addition of chloroform and ethanol to obtain 1.9 g (80%) of 1-[2-(4-propyl-cyclohexyl)ethyl]-4-(4-vinyl-cyclohexyl)benzene.

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