Electrogenerated N-heterocyclic carbene can behave as an organocatalyst in the Staudinger reaction (from imine and acyl chloride) in a very polar solvent, such as an ionic liquid.

Metal complexes carrying a new class of singlet carbene ligands stabilized by lateral enamine moieties are accessible by oxidative insertion into readily available chloro vinamidinium salts.

Homoenolates generated from enals by nucleophilic heterocyclic carbene (NHC) catalysis undergo a conjugate addition/cyclization sequence with cyclic dienones, culminating in the efficient synthesis of spirocyclopentanones.

Abstract The light‐driven gem ‐hydrogenation of internal alkynes in the presence [(NHC)(η 6 ‐cymene)RuCl 2 ] generates discrete ruthenium carbene complexes. When applied to appropriately designed enyne substrates, reactive intermediates thus formed will engage tethered olefin metathetic ring closure while splitting off a Hoveyda–Grubbs ‐type complex as secondary carbene. This unconventional app...

The N-heterocyclic carbene-catalyzed [3+3] cyclocondensation of bromoenals and aldimines was developed to give the corresponding dihydropyridinones in good yields with excellent enantioselectivities.

New samarium carbene complexes have been synthesized and characterized by X-ray diffraction analysis; the carbenic nature was assessed by reactivity studies.

New sterically encumbered N-heterocyclic carbene catalysts were synthesized and used to polymerize rac-lactide to give highly isotactic polylactide or meso-lactide to give heterotactic polylactide.

The synthesis and complete characterisation of a well-defined N-heterocyclic carbene bearing gold hydroxide complex, [Au(OH)(IPr)], is reported. Its reaction chemistry appears rich and diverse.

4,4’-Methylene diphenyl diisocyanate (4,4’-MDI) is a key linker in the production of polyurethanes. 4,4’-MDI thermally unstable, undergoing dimerization to unreactive and insoluble uretdione. The “catch–store–release” strategy presented Research Article by S. Groysman co-workers (DOI: 10.1002/chem.202300924) allows be stabilized form an imidazolium amidate that produced coordination two equival...

Photolysis (λ > 543 nm) of 3-thienyldiazomethane (1), matrix isolated in Ar or N(2) at 10 K, yields triplet 3-thienylcarbene (13) and α-thial-methylenecyclopropene (9). Carbene 13 was characterized by IR, UV/vis, and EPR spectroscopy. The conformational isomers of 3-thienylcarbene (s-E and s-Z) exhibit an unusually large difference in zero-field splitting parameters in the triplet EPR spectrum ...