1. Sydnone anions and abnormal N-heterocyclic carbenes of O-ethylsydnones. Characterizations, calculations and catalyses
- Author
-
Martin H. H. Drafz, Sascha Wiechmann, Eike G. Hübner, Tyll Freese, Jan C. Namyslo, Andreas Schmidt, Martin Nieger, Department of Chemistry, and Department
- Subjects
Stereochemistry ,education ,116 Chemical sciences ,DEPROTONATION ,INDAZOLE ,Medicinal chemistry ,Catalysis ,Adduct ,chemistry.chemical_compound ,Deprotonation ,CHEMISTRY ,Materials Chemistry ,INTERCONVERSIONS ,COORDINATION ,Indazole ,DERIVATIVES ,Aryl ,REARRANGEMENTS ,Metals and Alloys ,General Chemistry ,3. Good health ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry ,ALKYL AMINO CARBENES ,Ceramics and Composites ,COMPLEXES ,LIGANDS ,Sydnone - Abstract
Deprotonated sydnones, which can be represented as anionic N-heterocyclic carbenes, were prepared as Li adducts and compared with deprotonated O-ethylsydnones (5-ethoxy-1,2,3-oxadiazol-4-ylidenes) which belong to the class of abnormal NHCs. The Pd complexes of the sydnone anions (X-ray analysis) as well as of the O-ethylsydnone carbenes proved to be efficient catalysts in aryl couplings of thiophenes.
- Published
- 2014