Synthesis and structural properties of novel polycyclic aromatic compounds using photo-induced cyclisation of 2,7-di-tert-butyl-4-(phenylethenyl)pyrenes

摘要

Wittig reaction of 2,7-di-tert-butylpyrene-4-carbaldehyde with benzyltriphenylphosphonium salts in the presense of n-BuLi gave 2,7-di-tert-butyl-4-(phenylethenyl)pyrenes, from which naphthalene condensed aromatic compounds,2,7-di-tert-butyl-dibenzo[ij,no]tetraphenes, were obtained by photo-induced cyclisation in the presense of iodine.