The preparation of new Ru(II) complexes incorporating fac-coordinated lutidine-derived CNC ligands is reported. These derivatives are selectively deprotonated by tBuOK at one of the methylene arms of the pincer, leading to catalytically active species in the hydrogenation of imines.
Ru-CNN(H) complexes are efficient precatalysts in the hydrogenation and dehydrogenation of N-heterocycles. Under basic conditions, these derivatives lead to the formation of Ru(0) species that are observed under catalytic conditions.