An efficient route to unsymmetrical bis(azolium) salts: CCC-NHC pincer ligand complex precursors

TETRAHEDRON

卷:73

Article

Hollis, T. Keith¹ 

[1] Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA

关键词: Azolium salts;    Imidazole;    Triazole;    Benzimidazole;    High temperature ionic liquids;    CuO amination;    Bis(amination);   

DOI  :  10.1016/j.tet.2017.02.020

来源: Elsevier

【 摘 要 】

The coupling of N-heterocyclic azoles (imidazoles, benzimidazoles, triazoles) to bromobenzenes (1,2-; 1,3-; or 1,4) in a step-wise, sequential manner was accomplished by manipulation of reaction time and stoichiometry, which provided straight-forward access to unsymmetrical bis(azolium) salts in only three isolation steps from commercially-available starting materials. Eight mono(azole) substituted bromobenzenes, four mono(azolium)bromobenzene salts, twelve unsymmetrical bis(azole)benzenes, and fourteen unsymmetrical bis(azolium) salts, which are precursors for pincer ligand complexes, are reported. 2017 Published by Elsevier Ltd.

【 授权许可】

Free