scholarly journals Remote rearrangement of the metal center in a (η6-C6Me6)Ru(ii) complex

2015 ◽  
Vol 51 (24) ◽  
pp. 4981-4984 ◽  
Author(s):  
Koichi Takano ◽  
Yousuke Ikeda ◽  
Shintaro Kodama ◽  
Youichi Ishii
Keyword(s):  
Metal Center ◽  
Allyl Complex ◽  
Internal Alkynes ◽  
Metal Migration

Reaction of [(η6-C6Me6)Ru(Ph)(PMe3)]+ with internal alkynes gave rise to the 1,4-Ru migration to form the o-vinylaryl complex, providing the first example of 1,4-metal migration of a group 8 metal center; in one case further isomerization to an η3-allyl complex was observed.

Activation of a Carbon–Carbon Bond in Internal Alkynes: Vinylidene Rearrangement of Disubstituted Alkynes at an Ir Complex

Synlett ◽  
2017 ◽  
Vol 29 (06) ◽  
pp. 727-730 ◽  
Author(s):  
Youichi Ishii ◽  
Takuya Kuwabara ◽  
Shuhei Takamori ◽  
Satoshi Kishi ◽  
Takahiro Watanabe ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Metal Center ◽  
The Other ◽  
Carbon Bond ◽  
13C Labeling ◽  
Carbon Carbon Bond ◽  
Internal Alkynes ◽  
Selective Formation

Reactions of [Cp*Ir(PPh3)Cl2] with various internal acyl­alkynes in the presence of NaBArF 4 resulted in the selective formation of iridacycles via vinylidene rearrangement. 13C-labeling experiments revealed that the acyl group selectively migrates to the other acetylenic carbon atom. This trend is the same as that in the vinylidene rearrangement of internal alkynes at a group 8 metal center.

A new lithium diffusion model in layered oxides based on asymmetric but reversible transition metal migration

2020 ◽  
Vol 13 (4) ◽  
pp. 1269-1278 ◽  
Author(s):  
Kyojin Ku ◽  
Byunghoon Kim ◽  
Sung-Kyun Jung ◽  
Yue Gong ◽  
Donggun Eum ◽  
...  
Keyword(s):  
Transition Metal ◽  
Diffusion Model ◽  
Layered Oxides ◽  
Layered Oxide ◽  
Reversible Transition ◽  
Lithium Diffusion ◽  
Metal Migration

We propose a new lithium diffusion model involving coupled lithium and transition metal migration, peculiarly occurring in a lithium-rich layered oxide.

Some Problems in the Oxidative Addition and Binding of an Ethylene to a Transition Metal Center.

1987 ◽  
Vol 6 (4) ◽  
pp. 902-902
Author(s):  
Jerome Silestre ◽  
Maria Calhorda ◽  
Roald Hoffman ◽  
Page Stoutland ◽  
Robert Bergman
Keyword(s):  
Transition Metal ◽  
Oxidative Addition ◽  
Metal Center

Diastereoselective Reductive Arylation of Internal Alkynes

Synfacts ◽  
2018 ◽  
Vol 14 (09) ◽  
pp. 0955
Keyword(s):  
Internal Alkynes

Ruthenium(II)-Catalyzed Intermolecular Cyclo(co)trimerization of 3-Halopropiolamides with Internal Alkynes

2018 ◽  
Author(s):  
Anthony P. Silvestri ◽  
James S. Oakdale
Keyword(s):  
Ambient Temperature ◽  
Internal Alkynes

<div>A highly chemo- and regioselective cyclo(co)trimerization between 3-halopropiolamides and symmetrical internal alkynes is reported. The reaction is catalyzed by Ru(II)-complexes and proceeds at ambient temperature in ethanol to deliver fully substituted dihalogenated isophthalamides. 1,4-Butynediol was found to undergo spontaneous lactonization with halopropiolamides after trimerization to provide 5,7-dihalo-phthalide products.</div>

The First Coordination of an (α-Diazo)phosphine to a Transition-Metal Center

2003 ◽  
Vol 22 (7) ◽  
pp. 1358-1360 ◽  
Author(s):  
Emmanuelle Despagnet-Ayoub ◽  
Heinz Gornitzka ◽  
John Fawcett ◽  
Philip W. Dyer ◽  
Didier Bourissou ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Center

scholarly journals Molecular Dynamics of Cobalt Protoporphyrin Antagonism of the Cancer Suppressor REV-ERBβ

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3251
Author(s):  
Taufik Muhammad Fakih ◽  
Fransiska Kurniawan ◽  
Muhammad Yusuf ◽  
Mudasir Mudasir ◽  
Daryono Hadi Tjahjono
Keyword(s):  
Binding Site ◽  
Nuclear Receptor ◽  
Target Genes ◽  
Protoporphyrin Ix ◽  
Binding Energies ◽  
Metal Center ◽  
Complex Nature ◽  
Dynamic Simulations ◽  
Subtle Change ◽  
Cobalt Protoporphyrin

Nuclear receptor REV-ERBβ is an overexpressed oncoprotein that has been used as a target for cancer treatment. The metal-complex nature of its ligand, iron protoporphyrin IX (Heme), enables the REV-ERBβ to be used for multiple therapeutic modalities as a photonuclease, a photosensitizer, or a fluorescence imaging agent. The replacement of iron with cobalt as the metal center of protoporphyrin IX changes the ligand from an agonist to an antagonist of REV-ERBβ. The mechanism behind that phenomenon is still unclear, despite the availability of crystal structures of REV-ERBβ in complex with Heme and cobalt protoporphyrin IX (CoPP). This study used molecular dynamic simulations to compare the effects of REV-ERBβ binding to Heme and CoPP, respectively. The initial poses of Heme and CoPP in complex with agonist and antagonist forms of REV-ERBβ were predicted using molecular docking. The binding energies of each ligand were calculated using the MM/PBSA method. The computed binding affinity of Heme to REV-ERBβ was stronger than that of CoPP, in agreement with experimental results. CoPP altered the conformation of the ligand-binding site of REV-ERBβ, disrupting the binding site for nuclear receptor corepressor, which is required for REV-ERBβ to regulate the transcription of downstream target genes. Those results suggest that a subtle change in the metal center of porphyrin can change the behavior of porphyrin in cancer cell signaling. Therefore, modification of porphyrin-based agents for cancer therapy should be conducted carefully to avoid triggering unfavorable effects.

Effects of Proximity-Dependent Metal Migration on Bifunctional Composites Catalyzed Syngas to Olefins

ACS Catalysis ◽  
2021 ◽  
pp. 9729-9737
Author(s):  
Yi Ding ◽  
Feng Jiao ◽  
Xiulian Pan ◽  
Yi Ji ◽  
Mingrun Li ◽  
...  
Keyword(s):  
Metal Migration

ChemInform Abstract: Synthesis, Structure and Catalytic Activity of a Bimacrocyclic NHC Palladium Allyl Complex.

ChemInform ◽  
2008 ◽  
Vol 39 (52) ◽  
Author(s):  
Ole Winkelmann ◽  
Christian Naether ◽  
Ulrich Luening
Keyword(s):  
Catalytic Activity ◽  
Allyl Complex

Intermolecular [5+2] Annulation between 1‐Indanones and Internal Alkynes by Rh‐catalyzed C−C Activation

2021 ◽  
Author(s):  
Rui Zhang ◽  
Ying Xia ◽  
Guangbin Dong
Keyword(s):  
Internal Alkynes
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