26872-08-2Relevant articles and documents
Synthesis, structure and N-N bonding character of 1,1-disubstituted indazolium hexafluorophosphate
Ning, Yingtang,Kawahata, Masatoshi,Yamaguchi, Kentaro,Otani, Yuko,Ohwada, Tomohiko
, p. 1881 - 1884 (2018/02/23)
1,1-Disubstituted indazolium hexafluorophosphates were synthesized via intramolecular electrophilic amination reactions under mild conditions. The crystal structures were determined and are consistent with the presence of a stable N-N bond, which can be cleaved by hydrogenation. Both experimental and computational studies suggest a covalent bonding character of the N-N bond, with diminished aromaticity of the newly formed pyrazolium ring due to the quaternary ammonium atom (N1), in contrast to the aromatic character of the parent indazole.
Efficient macrocyclization achieved via conformational control using intermolecular noncovalent π-cation/arene interactions
Bolduc, Philippe,Jacques, Alexandre,Collins, Shawn K.
supporting information; experimental part, p. 12790 - 12791 (2010/11/04)
Quinolinium salt 3 is an effective additive that acts as a conformation control element (CCE) to promote macrocyclization to form rigid cyclophanes via olefin metathesis or Glaser-Hay coupling, which do not cyclize in the absence of the additive. The additives are easily synthesized and highly modifiable and have solubility profiles which allow for simple recovery via filtration.
