Site specific carboxylation of abnormal anionic N-heterocyclic dicarbenes with CO2.

Herein, we report experimental and computational results for the carboxylation of abnormal anionic N-heterocyclic dicarbenes (NHDCs) with CO2. Under ambient dosing conditions, carbonyl addition occurs selectively at C4 without a second carboxylation event occurring at the C2 carbene center.

Amine-free approach toward N-toluenesulfonyl amidine construction: a phosphite-mediated Beckmann-like coupling of oximes and p-toluenesulfonyl azide.

Atom hopping: A chlorophosphite-mediated Beckmann ligation of oximes and p-toluenesulfonyl azide gives access to N-sulfonyl phosphoramidines in good to excellent yields. The reaction proceeds under exceptionally mild conditions and constitutes a bioorthogonal approach toward amidines by avoiding the use of amines and transition-metal catalysts. dmp-ol=3,3-dimethylpropanediol.

Solid-state covalent capture of CO2 by using N-heterocyclic carbenes.

Capture me! The first report of an N-heterocyclic carbene (NHC) as a solid-state carbon capture reagent is presented. Experimental and theoretical measurements demonstrate the ability of the NHC to react rapidly and stoichiometrically with CO2 at low partial pressures.