Synthesis of an <i>N</i>-Mesityl Substituted Chiral Imidazolium Salt for NHC-Catalyzed Reactions
作者:Justin R. Struble、Juthanat Kaeobamrung、Jeffrey W. Bode
DOI:10.1021/ol800006m
日期:2008.3.1
A new synthetic approach to chiralimidazoliumsalts makes possible the first synthesis of an N-mesityl substituted, aminoindanol-derived N-heterocycliccarbeneprecursor, 1.ClO4. The successful synthesis allows the first direct comparison of otherwise identical imidazolium and triazolium precursors across a number of NHC-catalyzed processes. These studies confirm striking differences in reactivity
Thermal Ring Expansion of 2-Sulfonylimidoyl-1-phthalimidoaziridines into <i>N</i>
-Sulfonylimidazoles
作者:Aleksandr Stukalov、Vitalii V. Suslonov、Mikhail A. Kuznetsov
DOI:10.1002/ejoc.201701806
日期:2018.4.17
Di‐, tri‐substituted, and spiro‐fused 2‐sulfonylimidoyl‐1‐phthalimidoaziridines are transformed to di‐, tri‐substituted, and condensed N‐sulfonylimidazoles upon thermolysis. This ringexpansion is accompanied by an intramolecular 1,3‐sulfonyl shift.