Synthesis of S-Acetyl Oligo-p-aryleneethynylene Tetrathiols
作者:Omar Hassan Omar、Francesco Babudri、Gianluca M. Farinola、Francesco Naso、Alessandra Operamolla
DOI:10.1002/ejoc.201001049
日期:2011.1
A novel class of tetrathiolated aryleneethynylene oligomers was obtained by the Cassar-Heck-Sonogashira coupling between S,S'-(5-ethynyl-1,3-phenylene) bis(methylene) diethanethioate (1) and aryl diiodides or dibromides. Although standard coupling conditions are effective in the case of iodo derivatives, the addition of free triphenylphosphane to the reaction mixture was required to overcome the slower