Rhodium-Catalyzed C-H Methylation and Alkylation Reactions by Carbene-Transfer Reactions

Ru-Catalyzed Ortho C-H Alkylation of 4-Aryl-pyrrolo[2,3-d]pyrimidines with Diazo Compounds: An Access to Fluorescent Fused Heteroarenes

A Ru(II)-catalyzed migratory insertion of carbene into ortho C-H bonds of 4-aryl-pyrrolo[2,3-d]pyrimidines has been developed. This transformation endows the facile fabrication of C-C bonds with high atom economy, good regioselectivity, and wide functional group tolerance, exploiting the directing properties of pyrimidinic nitrogen. In addition, the planar polycyclic pyrrolo-pyrimido-isoindole framework has been accomplished from a cascade reaction of bromination, cyclization, and decarboxylation of synthesized products. Furthermore, the fluorescence properties of C-N annulated compounds have also been determined, which are valuable in the field of fluorescence properties of heterocycles.

Unlocking catalytic potential: a rhodium(II)-based coordination polymer for efficient carbene transfer reactions with donor/acceptor diazoalkanes

Herein, we report the use of a molecular-defined rhodium(II) coordination polymer (Rh-CP) as a heterogeneous, recyclable catalyst in carbene transfer reactions. We showcase the application of this heterogeneous catalyst in a range of carbene transfer reactions and conclude with the functionalization of natural products and drug molecules.