Using diaryliodonium salts as the arylating reagent and copper as a catalyst, a series of triarylsulfonium salts bearing benzoyl or benzoheterocyclic moieties were synthesized and characterized by 1H NMR, 13C NMR and high-resolution mass spectrometry. The photoinitiating behavior of the triarylsulfonium salts on photopolymerization of epoxy acrylate resin (UV6104) with hexane-1,6-diyldiacrylate (HDDA) as an activated monomer was investigated. The results showed that these triarylsulfonium salts could be utilized as cationic photoinitiators in the UV-curing process. A polymerization photoinitiation mechanism has been proposed.

In this study a novel method for direct synthesis of 2-phenyl heteroaromatic arenes was successfully developed. The title compounds were synthesized by reaction of heteroaromatic compounds with diphenylene iodonium trifluoromethanesulfonate in the presence of 5 mol% Pd(OAc)2 under mild reaction conditions (THF, 60 °C, 24 h). The proposed reaction mechanism was studied by HPLC.