Convenient, scalable and flexible method for the preparation of imidazolium salts with previously inaccessible substitution patterns
作者:Alois Fürstner、Manuel Alcarazo、Vincent César、Christian W. Lehmann
DOI:10.1039/b604236h
日期:——
A high yielding and modular approach to N,N′-disubstituted imidazolium salts is described, providing access to substitution patterns that are beyond the reach of established methodology.
PREPARATION OF A NON-SYMMETRICAL IMIDAZOLIUM SALT: 1-ADAMANTYL-3-MESITYL-4,5-DIMETHYLIMIDAZOLIUM TETRAFLUOROBORATE
作者:Fürstner, Alois、Alcarazo, Manuel、César, Vincent、Krause, Helga、Hopkins, Chad、Wipf, Peter
DOI:10.15227/orgsyn.085.0034
日期:——
Oxazolium Salts as Organocatalysts for the Umpolung of Aldehydes
作者:Venkata Krishna Rao Garapati、Michel Gravel
DOI:10.1021/acs.orglett.8b02636
日期:2018.10.19
and redox esterification reactions. An N-mesityl oxazolium salt catalyzed homobenzoin reaction of aromatic, heteroaromatic, and aliphatic aldehydes delivered α-hydroxy ketones in high yields. This newtype of catalyst proved remarkably effective for the Stetter reaction of challenging substrates such as β-alkyl-α,β-unsaturated ketones and electron-rich aromaticaldehydes in comparison to common thiazolium
Synthesis of 1,2-Diaryl- and 1-Aryl-2-alkylimidazoles with Sterically Demanding Substituents
作者:Maik Micksch、Mario Tenne、Thomas Strassner
DOI:10.1002/ejoc.201300688
日期:2013.9
developed a new, high-yielding procedure for the synthesis of 1,2-diaryl-substituted imidazoles with stericallydemandingsubstituents at the respective ortho positions by starting from commercially available anilines and benzoic acids through the corresponding acid chlorides. The metal-free method provides access to a variety of different substituents on the phenyl rings at N-1 and C-2 as well as at