Ligands, especially phosphines and carbenes, can play a key role in modifying and
controlling homogeneous organometallic catalysts, and they often provide a convenient …

Type A mesoionic compounds are of particular interest due to their participation in
synthetically useful 1, 3-dipolar cycloaddition reactions. This review covers the chemistry of …

Imidazolium salts were prepared which possess 2-ethoxyethyl pivalate or 2-(2-
ethoxyethoxy) ethyl pivalate groups as amphiphilic side chains with oxygen donors as well …

Sydnone methides are described from which only one single example has been mentioned
in the literature so far. Their deprotonation gave anions which can be formulated as π …

Mesoionic compounds are the starting material for the synthesis of unique anionic N-
heterocyclic carbenes. Herein, mesoionic imidazolium pyrrolides synthesized from pyrrole-2 …

In the past, the use of nitrogen ylides focused primarily on cycloadditions, where the 1, 3‐
dipole was used as a building block for the formation of heterocycles such as pyrroles or …

Sydnone imines were deprotonated at the C4 position to give lithium‐stabilized anions,
which proved to be stable for several months in solution. These anions are elements of the …

Wir beschreiben Sydnonmethide, von denen bisher nur ein einziges Beispiel in der Literatur
erwähnt worden war. Sydnonmethide können zu Anionen deprotoniert werden, die als π …

Starting from 4-nitropyrazole, eight mesoionic pyrazolium-4-aminides were prepared by a
six-step reaction sequence. The deprotonation of 1, 2-disubstituted 4-amido-1H-pyrazolium …

Unstable N-heterocyclic carbenes can be masked and stabilized as pseudo-cross-
conjugated hetarenium-carboxylates which decarboxylate on warming. This study deals with …