Abstract
Formylation of 2,7-di-tert-butylpyrene with dichloromethyl methyl ether in the presense of AlCl3 afforded a mixture of 2,7-di-tert-butylpyrene-4,9-biscarbaldehyde and 4,10-biscarbaldehyde in the ratio of 75:25, from which the corresponding bis(arylethynyl)pyrenes were obtained by the Wittig reaction with aryl methyl phosphonium ylides followed by bromination and dehydrobromination.
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