Catalytic Transfer Hydrogenation with a Methandiide-Based Carbene Complex: An Experimental and Computational Study.
Catalytic Transfer Hydrogenation with a Methandiide-Based Carbene Complex: An Experimental and Computational Study.
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基于甲烷二胺的卡宾配合物的催化转移氢化:实验和计算研究
DOI:
10.1002/chem.201502116
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
V. H. Gessner
中科院分区:
文献类型:
--
作者:
J. Weismann;V. H. Gessner
The transfer hydrogenation (TH) reaction of ketones with catalytic systems based on a methandiide‐derived ruthenium carbene complex was investigated and optimised. The complex itself makes use of the noninnocent behaviour of the carbene ligand (MCR2→MHC(H)R2), but showed only moderate activity, thus requiring long reaction times to achieve sufficient conversion. DFT studies on the reaction mechanism revealed high reaction barriers for both the dehydrogenation ofiPrOH and the hydrogen transfer. A considerable improvement of the catalytic activity could be achieved by employing triphenylphosphine as additive. Mechanistic studies on the role of PPh3in the catalytic cycle revealed the formation of a cyclometalated complex upon phosphine coordination. This ruthenacycle was revealed to be the active species under the reaction conditions. The use of the isolated complex resulted in high catalytic activities in the TH of aromatic as well as aliphatic ketones. The complex was also found to be active under base‐free conditions, suggesting that the cyclometalation is crucial for the enhanced activity.
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DOI:
10.1039/b710714e
发表时间:
2007-11
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
Rudy Coquet;Mizuki Tada;Y. Iwasawa
通讯作者:
Rudy Coquet;Mizuki Tada;Y. Iwasawa
影响因子:
--
作者:
P. Schröter;V. H. Gessner
通讯作者:
V. H. Gessner
影响因子:
4.3
作者:
Gessner, Viktoria H.;Meier, Florian;Kaupp, Martin
通讯作者:
Kaupp, Martin
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
V. H. Gessner;Julia K. Becker;Kai‐Stephan Feichtner
通讯作者:
Kai‐Stephan Feichtner
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
H. Brunner;W. Leitner
通讯作者:
W. Leitner