Use of aromatic polycyclic hydrocarbons and [Ru(bpy)3Cl2·(OAC)n] for the chemical redox activation of chemiluminescence in the oxidation of organoaluminum compounds by XeF2

1990 ◽  
Vol 39 (10) ◽  
pp. 2230-2230
Author(s):  
R. G. Bulgakov ◽  
V. N. Yakovlev ◽  
G. A. Tolstikov ◽  
V. P. Kazakov
Keyword(s):  
Organoaluminum Compounds ◽  
Polycyclic Hydrocarbons ◽  
Redox Activation

Electrochemically Driven Supramolecular Interaction of Quinones and Ferrocifens: An Example of Redox Activation of Bioactive Compounds

2015 ◽  
Vol 15 (2) ◽  
pp. 136-162 ◽  
Author(s):  
Yen de Paiva ◽  
Fabricia Rocha Ferreira ◽  
Thaissa Silva ◽  
Eric Labbe ◽  
Olivier Buriez ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Supramolecular Interaction ◽  
Redox Activation

scholarly journals Antioxidant Synergy of Mitochondrial Phospholipase PNPLA8/iPLA2γ with Fatty Acid–Conducting SLC25 Gene Family Transporters

Antioxidants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 678
Author(s):  
Martin Jabůrek ◽  
Pavla Průchová ◽  
Blanka Holendová ◽  
Alexander Galkin ◽  
Petr Ježek
Keyword(s):  
Lipid Peroxidation ◽  
Unsaturated Fatty Acids ◽  
Second Messengers ◽  
Redox Status ◽  
Mitochondrial Uncoupling ◽  
Mitochondrial Carrier ◽  
Mitochondrial Superoxide ◽  
Redox Activation ◽  
Mitochondrial Carrier Family ◽  
Alternatively Activated

Patatin-like phospholipase domain-containing protein PNPLA8, also termed Ca2+-independent phospholipase A2γ (iPLA2γ), is addressed to the mitochondrial matrix (or peroxisomes), where it may manifest its unique activity to cleave phospholipid side-chains from both sn-1 and sn-2 positions, consequently releasing either saturated or unsaturated fatty acids (FAs), including oxidized FAs. Moreover, iPLA2γ is directly stimulated by H2O2 and, hence, is activated by redox signaling or oxidative stress. This redox activation permits the antioxidant synergy with mitochondrial uncoupling proteins (UCPs) or other SLC25 mitochondrial carrier family members by FA-mediated protonophoretic activity, termed mild uncoupling, that leads to diminishing of mitochondrial superoxide formation. This mechanism allows for the maintenance of the steady-state redox status of the cell. Besides the antioxidant role, we review the relations of iPLA2γ to lipid peroxidation since iPLA2γ is alternatively activated by cardiolipin hydroperoxides and hypothetically by structural alterations of lipid bilayer due to lipid peroxidation. Other iPLA2γ roles include the remodeling of mitochondrial (or peroxisomal) membranes and the generation of specific lipid second messengers. Thus, for example, during FA β-oxidation in pancreatic β-cells, H2O2-activated iPLA2γ supplies the GPR40 metabotropic FA receptor to amplify FA-stimulated insulin secretion. Cytoprotective roles of iPLA2γ in the heart and brain are also discussed.

scholarly journals Catalytic Systems Based on Cp2ZrX2 (X = Cl, H), Organoaluminum Compounds and Perfluorophenylboranes: Role of Zr,Zr- and Zr,Al-Hydride Intermediates in Alkene Dimerization and Oligomerization

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 39
Author(s):  
Lyudmila V. Parfenova ◽  
Pavel V. Kovyazin ◽  
Almira Kh. Bikmeeva ◽  
Eldar R. Palatov
Keyword(s):  
Diffusion Coefficients ◽  
Organoaluminum Compounds ◽  
Zirconium Hydride ◽  
Nmr Studies ◽  
Catalytic Systems ◽  
Selective Formation

The activity and chemoselectivity of the Cp2ZrCl2-XAlBui2 (X = H, Bui) and [Cp2ZrH2]2-ClAlEt2 catalytic systems activated by (Ph3C)[B(C6F5)4] or B(C6F5)3 were studied in reactions with 1-hexene. The activation of the systems by B(C6F5)3 resulted in the selective formation of head-to-tail alkene dimers in up to 93% yields. NMR studies of the reactions of Zr complexes with organoaluminum compounds (OACs) and boron activators showed the formation of Zr,Zr- and Zr,Al-hydride intermediates, for which diffusion coefficients, hydrodynamic radii, and volumes were estimated using the diffusion ordered spectroscopy DOSY. Bis-zirconium hydride clusters of type x[Cp2ZrH2∙Cp2ZrHCl∙ClAlR2]∙yRnAl(C6F5)3−n were found to be the key intermediates of alkene dimerization, whereas cationic Zr,Al-hydrides led to the formation of oligomers.

Synthesis and Characterization of 16π Antiaromatic 2,7‐Dihydrodiazapyrenes: Antiaromatic Polycyclic Hydrocarbons with Embedded Nitrogen

2021 ◽  
Author(s):  
Takumi Nakazato ◽  
Haruka Takekoshi ◽  
Takahiro Sakurai ◽  
Hiroshi Shinokubo ◽  
Yoshihiro Miyake
Keyword(s):  
Synthesis And Characterization ◽  
Polycyclic Hydrocarbons

Microsome-mediated reactions of phenols of polycyclic hydrocarbons with DNA

1984 ◽  
Vol 22 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Alan Hewer ◽  
David H. Phillips ◽  
Ruth M. Hodgson ◽  
Philip L. Grover
Keyword(s):  
Polycyclic Hydrocarbons
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