Copper and zinc co-catalyzed synthesis of imidazoles via the activation of sp3 C–H and N–H bonds

Copper-Catalyzed Defluorinative [3 + 2] Cyclization of Amidines and Trifluoromethyl Carbenoids for the Synthesis of 5-Fluoroimidazoles

A Cu-catalyzed [3 + 2] cyclization of amidines with trifluoromethyldiazo compounds is described. The reaction affords 5-fluoroimidazoles in good yields by cleaving dual C-F bonds in a CF3 group. Using 2-aminoazo heterocycles as the substrates, various annelated imidazoles containing a fluorine atom were also constructed by this method without changing the conditions. The resultant 5-fluoroimidazoles show high reactivity toward SNAr reactions with a series of nucleophiles.

Synthesis of 1,2,4-triazine derivatives via [4 + 2] domino annulation reactions in one pot

Simple and efficient [4 + 2] domino annulation reactions have been developed for the synthesis of 1,2,4-triazine derivatives.

Copper-catalyzed oxidative coupling reaction of α,β-unsaturated aldehydes with amidines: synthesis of 1,2,4-trisubstituted-1H-imidazole-5-carbaldehydes

A convenient synthesis of 1,2,4-trisubstituted-1H-imidazole-5-carbaldehydes was developed, which features high atom economy, cheap catalysts and mild conditions.

Reusable ionic liquid-catalyzed oxidative coupling of azoles and benzylic compounds via sp3 C–N bond formation under metal-free conditions

The heterocyclic ionic liquid-catalyzed direct oxidative amination of benzylic sp³ C–H bonds via intermolecular sp³ C–N bond formation for the synthesis of N-alkylated azoles under metal-free conditions is reported for the first time.

Bond and small-molecule activation with low-valent nickel complexes

The use of nickel compounds in low oxidation states allowed a variety of useful transformations of interest for academia, industry and in the solution of environmental issues.

I2-Catalyzed diamination of acetyl-compounds for the synthesis of multi-substituted imidazoles

We have successfully developed the I₂-catalysed synthesis of substituted imidazole derivatives from amidines and ketones in good to excellent yields and 100% regioselectivity.

Synthesis of tetra-substituted imidazoles and 2-imidazolines by Ni(0)-catalyzed dehydrogenation of benzylic-type imines

A one pot methodology using simple imines allowed the formation of N-substituted imidazoles and imidazolines.