Synthesis and spectral properties of 2,7-di-tentbuty1-4,9-bis(arylethyny1)-and 4,10-bis(arylethynyl)pyrenes

摘要

Formylation of 2,7-di-tert-butylpyrene with dichloromethyl methyl ether in the presense of AlC13 afforded a mixtureof 2,7-di-tert-butylpyrene-4,9-biscarbaldehyde and 4,10-biscarbaldehyde in the ratio of 75:25, from which thecorresponding bis(arylethynyl)pyrenes were obtained by the Wittig reaction with aryl methyl phosphonium ylidesfollowed by bromination and dehydrobromination.