Fig. 3: Synthetic strategy followed for the construction of a non-bridged Ar4N+ structure.
From: Synthesis and characterization of tetraphenylammonium salts
a Direct N-phenylation of 8 with a Ph cation is difficult as the N atom is a weak nucleophile. b Intermolecular radical coupling reaction between an aryl radical and the triarylammoniumyl salt 9 bearing bulky protecting groups that exert steric hindrance and block the reactions at the Ph groups.
