New Lipophilic 2-Amino-<i>N</i>,<i>Nâ²</i>-dialkyl-4,5-dimethylimidazolium Cations: Synthesis, Structure, Properties, and Outstanding Thermal Stability in Alkaline Media
作者:Romanâ A. Kunetskiy、Ivana CÃsarÌová、David SÌaman、Ilyaâ M. Lyapkalo
DOI:10.1002/chem.200901203
日期:2009.9.21
A series of new N,N′‐dialkyl‐4,5‐dimethylimidazolium cations possessing electron‐rich 2‐imidazolylidene‐ or phosphoranylidene‐amino substituents has been efficiently synthesized from common precursors, N,N′‐dialkyl‐4,5‐dimethylimidazol‐2‐ylidenes. The new lipophilic salts obtained have been found to be highly stable towards strong alkali under both biphasic and homogeneous conditions. Their exceptional