反应详情

In a 500-ml three-neck flask were placed 31 g of 3,3',4,4'-tetramethyldiphenylamine synthesized in Example 3 (1), 40 g of 4-iodobiphenyl, 19 g of anhydrous potassium carbonate, 2 g of copper sulfate pentahydrate and 20 ml of n-tridecane, and after carrying out the reaction for 28 hours at 200° C. under a nitrogen gas stream, the reaction mixture was cooled to room temperature. The reaction mixture was subjected to a column purification (solvent: n-hexane/toluene =10/1) with activated alumina and the solvent was distilled off under reduced pressure. The residue was recrystallized from a mixed solvent of ethyl acetate and ethanol to provide 37 g of N,N-bis(3,4-dimethylphenyl)biphenyl-4-amine. (Melting point 119° to 120.5° C. colorless crystals, IR spectrum shown in FIG. 4)

1. customIn a 500-ml three-neck flask were placed
2. customthe reaction for 28 hours at 200° C. under a nitrogen gas stream
3. customThe reaction mixture was subjected to a column purification (solvent: n-hexane/toluene =10/1) with activated alumina
4. distillationthe solvent was distilled off under reduced pressure
5. customThe residue was recrystallized from a mixed solvent of ethyl acetate and ethanol