Reactivity of boraguanidinato germylenes toward carbonyl compounds and isocyanides: C–O, C–F and C–N bond activation

2020 ◽  
Vol 49 (15) ◽  
pp. 4869-4877 ◽  
Author(s):  
Jiří Böserle ◽  
Roman Jambor ◽  
Aleš Růžička ◽  
Milan Erben ◽  
Libor Dostál
Keyword(s):  
Carbonyl Compounds ◽  
Bond Activation ◽  
Chemical Bonds

The titled germylene was shown to be able to activate various chemical bonds (C–N, C–F or CO) depending on the substrate used.

Preparation of hydrido [CNC]-pincer cobalt complexes via selective C–H/C–F bond activation and their catalytic performances

2018 ◽  
Vol 42 (19) ◽  
pp. 15578-15586 ◽  
Author(s):  
Fei Yang ◽  
Yangyang Wang ◽  
Faguan Lu ◽  
Shangqing Xie ◽  
Xinghao Qi ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bond Activation ◽  
Cobalt Complexes ◽  
Catalytic Performances

[CNC]-pincer Co hydrides were synthesized via selective C–H/C–F activation and catalyzed hydrosilylation of carbonyl compounds.

Transition-metal-catalyzed direct β-functionalization of simple carbonyl compounds

2014 ◽  
Vol 1 (7) ◽  
pp. 838-842 ◽  
Author(s):  
Guobing Yan ◽  
Arun Jyoti Borah
Keyword(s):  
Transition Metal ◽  
Carbonyl Compounds ◽  
Bond Activation ◽  
Active Area ◽  
Synthetic Chemistry ◽  
Chemical Transformations ◽  
Recent Advances ◽  
Direct Functionalization ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

Chemical transformations via catalytic C–H bond activation have been established as one of the most powerful tools in organic synthetic chemistry. Transition-metal-catalyzed direct functionalization of β-C(sp3)–H bonds of carbonyl compounds has been developed in recent years. This highlight will focus on recent advances in this active area and their mechanisms are also discussed.

scholarly journals Metal–ligand cooperation by aromatization–dearomatization as a tool in single bond activation

2015 ◽  
Vol 373 (2037) ◽  
pp. 20140189 ◽  
Author(s):  
David Milstein
Keyword(s):  
Bond Activation ◽  
Short Review ◽  
Catalytic Reactions ◽  
Pincer Complexes ◽  
Chemical Bonds ◽  
Single Bond ◽  
Metal Centre ◽  
Pincer Ligand ◽  
Mechanistic Insight ◽  
Metal Ligand

Metal–ligand cooperation (MLC) plays an important role in bond activation processes, enabling many chemical and biological catalytic reactions. A recent new mode of activation of chemical bonds involves ligand aromatization–dearomatization processes in pyridine-based pincer complexes in which chemical bonds are broken reversibly across the metal centre and the pincer-ligand arm, leading to new bond-making and -breaking processes, and new catalysis. In this short review, such processes are briefly exemplified in the activation of C–H, H–H, O–H, N–H and B–H bonds, and mechanistic insight is provided. This new bond activation mode has led to the development of various catalytic reactions, mainly based on alcohols and amines, and to a stepwise approach to thermal H 2 and light-induced O 2 liberation from water.

scholarly journals Ester Transfer Reaction of Aromatic Esters with Haloarenes and Arenols by a Nickel Catalyst

2020 ◽  
Author(s):  
Ryota Isshiki ◽  
Naomi Inayama ◽  
Kei Muto ◽  
Junichiro Yamaguchi
Keyword(s):  
Nickel Catalyst ◽  
Transfer Reaction ◽  
Functional Group ◽  
Bond Activation ◽  
Halogen Bond ◽  
Aryl Halides ◽  
Aromatic Ester ◽  
Chemical Bonds ◽  
Reaction Progress ◽  
Aromatic Esters

A catalytic ester transfer reaction of aromatic esters with aryl halides/arenols was developed. The present reaction can transfer an ester functional group from certain aromatic esters to haloarenes. This ester transfer reaction involves two oxidative additions­­— one from the C–C bond of the aromatic ester and one from the C–halogen bond of haloarenes— onto a nickel catalyst. The utilization of a Ni/dcypt catalyst capable of cleaving both chemical bonds was a key for the reaction progress. Furthermore, naphthol-based aryl electrophiles were also applicable to the catalytic system via C–O bond activation.

scholarly journals α‐Arylation of Carbonyl Compounds through Oxidative C−C Bond Activation

2019 ◽  
Vol 58 (29) ◽  
pp. 9816-9819 ◽  
Author(s):  
Jing Li ◽  
Adriano Bauer ◽  
Giovanni Di Mauro ◽  
Nuno Maulide
Keyword(s):  
Carbonyl Compounds ◽  
Bond Activation

Rhenium-catalyzed synthesis of indene derivatives via C-H bond activation

2008 ◽  
Vol 80 (5) ◽  
pp. 1149-1154 ◽  
Author(s):  
Yoichiro Kuninobu ◽  
Yuta Nishina ◽  
Atsushi Kawata ◽  
Makoto Shouho ◽  
Kazuhiko Takai
Keyword(s):  
Carbonyl Compounds ◽  
Bond Activation ◽  
Reductive Elimination ◽  
Aromatic Ketones ◽  
Rhenium Complex ◽  
Aromatic Imines ◽  
Catalyzed Reactions ◽  
Nucleophilic Cyclization

Rhenium complex, [ReBr(CO)3(thf)]2-catalyzed reactions between aromatic imines and either acetylenes or α,β-unsaturated carbonyl compounds gave indene derivatives in good to excellent yields. These reactions proceed via C-H bond activation, insertion of acetylenes or α,β-unsaturated carbonyl compounds, intramolecular nucleophilic cyclization, and reductive elimination. Indene derivatives were also obtained from aromatic ketones and α,β-unsaturated carbonyl compounds in the presence of catalytic amounts of the rhenium complex and p-anisidine. Sequential ruthenium-catalyzed hydroamination of aromatic acetylenes with anilines, and rhenium-catalyzed reactions of the formed aromatic ketimines with α,β-unsaturated carbonyl compounds also provided indene derivatives.

scholarly journals Charge Density and Chemical Bonding in Inorganic Materials

2014 ◽  
Vol 70 (a1) ◽  
pp. C8-C8
Author(s):  
Wolfgang Scherer
Keyword(s):  
Transition Metal Oxides ◽  
Bond Activation ◽  
Chemical Properties ◽  
Inorganic Materials ◽  
Catalytic Reactions ◽  
Valence Shell ◽  
Chemical Bonds ◽  
Complex Interplay ◽  
Main Group Elements ◽  
And Chemical Properties

Since the theoretical prediction and experimental verification of Charge Concentrations (CCs) in the valence shell of main group elements and transition metals several attempts have been undertaken to understand their origin and relevance in chemistry and physics. In pioneering studies we could demonstrate that these CCs not only influence the geometry of coordination compounds and solids but also serve as controlling parameters for important chemical reactions like the activation of chemical bonds in catalytic reactions [1]. Furthermore, in covalent solids such as transition metal oxides and carbides they appear to signal even subtle electron localization phenomena which might induce metal-to-insulator transitions or effect the onset of superconductivity [2]. The complex interplay between valence shell charge concentrations and chemical properties of molecules and solids will be the central topic of this contribution with the focus on (i) unusual bonding scenarios displayed by solid state compounds [3] and the (ii) control of geometry and bond activation processes in molecules.

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