2,2'-Dimethyl-5,5'-bis(3-bromo-1-adamantyl)biphenyl → 2,2'-Dimethyl-5,5'-bis(3-(3,5-diethynylphenyl)-1-adamantyl)biphenyl

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From the obtained 2,2′-dimethyl-5,5′-bis(1-adamantyl)-biphenyl 10 g, the same method as in Synthesis Example 7 was used to synthesize 2,2′-dimethyl-5,5′-bis(3-bromo-1-adamantyl)biphenyl 4.5 g, then the same method as in Synthesis Example 3 was used to obtain 2,2′-dimethyl-5,5′-bis(3-(3,5-diethynylphenyl)-1-adamantyl)biphenyl 3.8 g.

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