10.1021/acs.organomet.5b00727.s001
Huining Chai
Huining
Chai
Tingting Liu
Tingting
Liu
Qingfu Wang
Qingfu
Wang
Zhengkun Yu
Zhengkun
Yu
Substituent Effect on the Catalytic Activity of Ruthenium(II)
Complexes Bearing a Pyridyl-Supported Pyrazolyl-Imidazolyl Ligand
for Transfer Hydrogenation of Ketones
American Chemical Society
2015
Substituent Effect
NNN ligand
order NHTs
Catalytic Activity
imidazolyl moiety
345 600
RuH complexes
NMR
TOF value
transfer hydrogenation
Transfer Hydrogenation
2015-11-09 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Substituent_Effect_on_the_Catalytic_Activity_of_Ruthenium_II_Complexes_Bearing_a_Pyridyl_Supported_Pyrazolyl_Imidazolyl_Ligand_for_Transfer_Hydrogenation_of_Ketones/2111248
Air- and moisture-stable ruthenium(II)
complexes bearing a multisubstituted
pyrazolyl-imidazolyl-pyridine ligand were synthesized and structurally
characterized by NMR and X-ray single-crystal crystallographic analyses.
The substituents on the imidazolyl moiety of the NNN ligand exhibited
a remarkable impact on the catalytic activity of the corresponding
Ru(II) complexes for transfer hydrogenation of ketones in refluxing
2-propanol, following the order NHTs > Me > H > NO<sub>2</sub>, to
tune the catalytic activity. The highest final TOF value of 345 600
h<sup>–1</sup> was reached by means of 0.05 mol % of the Ru(II)-NHTs-substituted
NNN complex as the catalyst. The corresponding structurally confirmed
RuH complexes are proposed as the catalytically active species.