Co(II)-Catalyzed Additive-Free Transfer Hydrogenation of -Heteroarenes at Room Temperature.

Traditional catalyst development relies on multistep synthesis and isolation of ligand and precatalyst. Designing a catalytic system that can be assembled from easily accessible starting materials can decrease the reaction complexity and enhance the synthetic utility. Herein, we report an inexpensive and commercially available CoBr·HO/terpyridine-catalyzed effective and straightforward transfer hydrogenation (TH) protocol for -heteroarenes, utilizing NH·BH (AB) under ambient conditions.

Methyl Formate, an Alternative Transfer Hydrogenating Agent for Chemoselective Reduction of -Heteroarenes and Azoarenes.

The search for efficient molecular hydrogen precursors and their catalytic exploration is necessary for the evolution of catalytic transfer hydrogenation. Methyl formate (MF) having high hydrogen content still remains unexplored for such transformations. Herein, we disclosed a bifunctional Ir(III)-complex catalyzed chemoselective TH protocol for -heteroarenes and azoarenes using MF.