Carbon Tetrachloride → 1,1'-Biphenyl, 4-ethenyl-2-fluoro-

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In 750 ml. of carbon tetrachloride was dissolved 10 g of 2-fluoro-4-ethylbiphenyl. Then to the solution were added 10 g of N-bromosuccinimide and 0.1 g of benzoyl peroxide. After cooling, a solid substance was filtered off, and from the filtrate containing α-(2-fluoro-4-biphenylyl)ethyl bromide was distilled off the carbon tetrachloride. The residue thus obtained was dissolved in 500 ml. of ethyl alcohol, and then added with 17 g of potassium hydroxide. The resultant mixture was refluxed under heating for 1 hour. After cooling, the reaction mixture was poured into 2.5 l. of water, and then subjected to extraction with benzene. The benzene layer was washed with water, and dried with magnesium sulfate. The benzene in the layer was distilled off, and the resulting residue was subjected to column chromatography. From hexane eluate was obtained 5.5 g of 2-fluoro-4-vinylbiphenyl.

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