Cobalt(III)-Catalyzed C–H Activation: Azo Directed Selective 1,4-Addition of Ortho C–H Bond to Maleimides

Rh(iii)-Catalyzed regioselective mono- and di-iodination of azobenzenes using alkyl iodide

We developed a highly chemoselective oxidative access to ortho-iodinated azobenzenes by Rh(iii)-catalysis with alkyl iodide as the iodinating reagent.

Rhodium-catalyzed C7-alkylation of indolines with maleimides

A rhodium(iii)-catalyzed direct cross-coupling reaction of indolines with maleimides via C–H bond activation was developed.

Rhodium(iii)-catalyzed C–H activation at the C4-position of indole: switchable hydroarylation and oxidative Heck-type reactions of maleimides

A Rh(iii)-catalyzed C–H activation of indole at the C4-position leading to novel and switchable functionalization has been reported by employing a weakly co-ordinating COCF₃ group as a directing group.

Cobalt(iii)-catalyzed 1,4-addition of C–H bonds of oximes to maleimides

An oxime directed cobalt-catalyzed sp² C–H bond addition reaction was developed with a broad substrate scope and no external additives were needed.

Synthesis of Succinimide Derivatives by NHC-Catalyzed Stetter Reaction of Aromatic Aldehydes with N-Substituted Itaconimides

An N-heterocyclic carbene-catalyzed intermolecular Stetter reaction of aromatic aldehydes with N-substituted itaconimides has been developed. A delicate balance between the Stetter reaction and the competing isomerization of the itaconimide double bond has been achieved in this operationally simple reaction to afford valuable new succinimide derivatives containing 1,4 and 1,5 dicarbonyl scaffolds in good to excellent yields. The reaction tolerates variable substituents on both aldehydes and N-substituted itaconimides.

Co(III)-Catalyzed C-H Activation: A Site-Selective Conjugate Addition of Maleimide to Indole at the C-2 Position

The cobalt(III)-catalyzed site-selective C-2 functionalization of indole has been developed using the pyrimidinyl group as a directing group. This reaction furnishes 3-arylated succinimide derivatives in excellent yields in a shorter duration using an inexpensive Co catalyst. Highly selective C-2 functionalization of indoles was achieved in the presence of the highly reactive C-3 position. This protocol is compatible with a variety of N-pyrimidinyl indole and maleimide derivatives, and it can be easily scaled-up. This method is also applicable for maleic ester and heteroarenes.