TRANSFER HYDROGENATION IN THE PRESENCE OF RHODIUM (I) BIS-IMINE COMPLEXES
The reaction of hydrogen transfer from 2-propanol to acetophenone (APh) in the presence of [Rh(cod)Cl]2 + L] system where L - bis-aldimine ligands on the basis of (R,R)-1,2-cyclohexanediamine and pyridine-, quinoline - and thiophenecarboxaldehydes has been studied. Optically active ligand complexes with rhodium (I) showed high catalytic activity (up to 489 h-1) and moderate enantioselectivity (up to 28% of ee (R)-1-phenylethanol). Using NMR spectroscopy method and DFT calculations a structure of rhodium (I) cyclooctadiene complex was determined.