Cover Feature: Manganese-Triazolylidene Catalysis for The Synthesis of 1,2,3,4-Tetrahydroquinoxalines and Selective Alkylation of Diamines and Anilines with Alcohols and Diols (ChemCatChem 14/2025)

Abstract

The Cover Feature shows the coupling of amines with alcohols, catalyzed by a manganese complex bearing a bis-triazolylidene ligand through a borrowing hydrogen mechanism. The two hands symbolize the dual role of the catalyst: it first “borrows” a hydride from the alcohol during the dehydrogenation step, then “returns” it in the final hydrogenation step, completing the catalytic cycle. In their Research Article (DOI: 10.1002/cctc.202500113), B. Royo and co-workers demonstrate the high efficiency of such manganese complexes for borrowing processes.