Hydrogenation of α-enaminoketones with cobalt phosphine-modified catalysts
摘要:
The synthesis of alpha-enamines and hydrogenation of these compounds were studied using cobalt-modified complexes. Cobalt complexes were characterized by H-1, C-13 and P-31 NMR, elemental analysis and IR spectroscopy. Furthermore, the molecular structures of complexes C1-C2 and C4-C5 have been determined by single-crystal X-ray diffraction. All cobalt complexes investigated were active catalysts for the hydrogenation reaction. The best catalytic activity was obtained with an ortho-substituent in the phosphine ligand. Noteworthy, the reduction was chemoselective over the double bond. (C) 2012 Elsevier B.V. All rights reserved.
Hydrogenation of α-enaminoketones with cobalt phosphine-modified catalysts
摘要:
The synthesis of alpha-enamines and hydrogenation of these compounds were studied using cobalt-modified complexes. Cobalt complexes were characterized by H-1, C-13 and P-31 NMR, elemental analysis and IR spectroscopy. Furthermore, the molecular structures of complexes C1-C2 and C4-C5 have been determined by single-crystal X-ray diffraction. All cobalt complexes investigated were active catalysts for the hydrogenation reaction. The best catalytic activity was obtained with an ortho-substituent in the phosphine ligand. Noteworthy, the reduction was chemoselective over the double bond. (C) 2012 Elsevier B.V. All rights reserved.