4,5-Disubstituted N,N′-Di-tert-alkyl Imidazolium Salts: New Synthesis and Structural Features
作者:Anastasia A. Grishina、Svetlana M. Polyakova、Roman A. Kunetskiy、Ivana Císařová、Ilya M. Lyapkalo
DOI:10.1002/chem.201002805
日期:2011.1.3
It's getting crowded! The synthesis of a new subfamily of imidazolium cations with exceptionally spatially demanding substitution patterns (see scheme) paved the way to reconcile two antagonising effects: steric hindrance and innately high donating ability/basicity in the peralkylated imidazol‐2‐ylidene ligands/uncharged bases.
越来越拥挤!合成咪唑鎓阳离子新的亚族,其空间上要求极高的取代模式(参见方案)为调和两种拮抗作用铺平了道路:位阻和全烷基化的咪唑-2-亚烷基配体/不带电荷的碱基固有的高供体能力/碱性。