
%0 Journal Article
%A Crossley, MJ 
%A Gorjian, S 
%A Sternhell, S 
%A Tansey, KM 
%T The Synthesis of Some Lipophilic Tetradentate Ligands for Use in the Formation of Metal-Linked Polymers
%J Australian Journal of Chemistry
%D 1994/04/01
%V 47
%N 4
%P 723-738
%K 
%R https://doi.org/10.1071/CH9940723
%U https://www.publish.csiro.au/paper/CH9940723 
%X Two lipophilic tetradentate ligands, 5,5&#8242;-di-t-butyl- and 5,5&#8242;-dihexyl-2,2&#8242;-bipyrimidine, were prepared via either Ullmann or nickel(0)-promoted reactions in low but useful yields. Approaches towards the synthesis of lipophilic ligands based on 2,2&#8242;-biimidazole, namely 4,4&#8242;,5,5&#8242;-tetrabutyl-2,2&#8242;-biimidazole (from decane-4,5-dione) and various 4,4&#8242;,5,5&#8242;-tetra( arylamino )- 2,2&#8242;-biimidazoles (from 4,4&#8242;,5,5&#8242;-tetrabromo-2,2&#8242;-biimidazole and arylamines), and a 2,2&#8242;- bibenzimidazole , 5,5&#8242;,6,6?-tetra( octyloxy )-2,2&#8242;-bibenzimidazole (from N,N&#8242;- bis [4,5-di( octyloxy )-2-nitrophenyl] oxamide ), were uniformly unsuccessful for preparing the 2,2&#8242;-biheteroaryl compounds. 
