| 摘要 |
PURPOSE: A method for preparing 4,4'-bis(2,2-diphenyl-1-vinyl)-1,1'-biphenyl derivative and a 4,4'-bis(2,2-diphenyl-1-vinyl)-1,1'-biphenyl derivative prepared by the method are provided to improve the purity and the production yield and to simplify the purification process largely. CONSTITUTION: The method comprises the steps of halomethylating the biphenyl derivative of the formula 2 to obtain the 4,4'-bis(halomethyl)-1,1'-biphenyl derivative of the formula 3; reacting the compound of the formula 3 with triethyl phosphite to obtain the 4,4'-bis(diethoxyphosphinylmethyl)-1,1'-biphenyl derivative; and reacting the compound of the formula 4 with benzophenol to obtain 4,4'-bis(2,2-diphenyl-1-vinyl)-1,1'-biphenyl derivative of the formula 1 by the Wittig reaction, wherein X is a halogen atom and R1 and R2 are H, a halogen atom or an alkyl group of C1-C4, respectively. Preferably the halomethylation is carried out in the presence of alkylammonium halide, halogenated alkali metal salt and paraformaldehyde in an organic or inorganic solvent; and the Wittig reaction is carried out in the presence of a base selected from the group consisting of alkoxy alkali metal salt of C1-C4, alkyl alkali metal salt of C1-C4 and alkali hydride.
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