ChemInform Abstract: Cross-Couplings Using Aryl Ethers via C-O Bond Activation Enabled by Nickel Catalysts

ChemInform ◽  
2015 ◽  
Vol 46 (34) ◽  
pp. no-no
Author(s):  
Mamoru Tobisu ◽  
Naoto Chatani
Keyword(s):  
Bond Activation ◽  
Nickel Catalysts ◽  
Aryl Ethers

Robust Heterogeneous Nickel Catalysts with Tailored Porosity for the Selective Hydrogenolysis of Aryl Ethers

ChemCatChem ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Muhammad Zaheer ◽  
Justus Hermannsdörfer ◽  
Winfried P. Kretschmer ◽  
Günter Motz ◽  
Rhett Kempe
Keyword(s):  
Nickel Catalysts ◽  
Selective Hydrogenolysis ◽  
Aryl Ethers

ChemInform Abstract: Robust Heterogeneous Nickel Catalysts with Tailored Porosity for the Selective Hydrogenolysis of Aryl Ethers.

ChemInform ◽  
2014 ◽  
Vol 45 (30) ◽  
pp. no-no
Author(s):  
Muhammad Zaheer ◽  
Justus Hermannsdoerfer ◽  
Winfried P. Kretschmer ◽  
Guenter Motz ◽  
Rhett Kempe
Keyword(s):  
Nickel Catalysts ◽  
Selective Hydrogenolysis ◽  
Aryl Ethers

Nickel Carbodicarbene Catalyzes Kumada Cross-Coupling of Aryl Ethers with Grignard Reagents through C-O Bond Activation

2019 ◽  
Vol 2019 (30) ◽  
pp. 3511-3517 ◽  
Author(s):  
Ram Ambre ◽  
Hsuan Yang ◽  
Wen-Ching Chen ◽  
Glenn P. A. Yap ◽  
Titel Jurca ◽  
...  
Keyword(s):  
Bond Activation ◽  
Cross Coupling ◽  
Grignard Reagents ◽  
Aryl Ethers

Efficient and selective hydrogenation of C–O bonds with a simple sodium formate catalyzed by nickel

2018 ◽  
Vol 54 (12) ◽  
pp. 1521-1524 ◽  
Author(s):  
Xiaoxiang Xi ◽  
Tieqiao Chen ◽  
Ji-Shu Zhang ◽  
Li-Biao Han
Keyword(s):  
Selective Hydrogenation ◽  
Sodium Formate ◽  
Nickel Catalysts ◽  
Aryl Ethers

A Ni-catalyzed hydrogenation of C–O compounds with sodium formate is developed. Various esters, i.e. aryl, alkenyl, benzyl pivalates, and even the aryl ethers, were efficiently reduced with a loading of nickel catalysts down to 0.5 mol%.

Metal-Metal Cooperative Bond Activation by Heterobimetallic Alkyl, Aryl, and Acetylide PtII/CuI Complexes

2020 ◽  
Author(s):  
Shubham Deolka ◽  
Orestes Rivada Wheelaghan ◽  
Sandra Aristizábal ◽  
Robert Fayzullin ◽  
Shrinwantu Pal ◽  
...  
Keyword(s):  
Alkyl Group ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Terminal Alkyne ◽  
Alkyl Aryl ◽  
Metal Metal ◽  
The Stability ◽  
Selective Formation ◽  
Organoplatinum Compounds

We report selective formation of heterobimetallic PtII/CuI complexes that demonstrate how facile bond activation processes can be achieved by altering reactivity of common organoplatinum compounds through their interaction with another metal center. The interaction of the Cu center with Pt center and with a Pt-bound alkyl group increases the stability of PtMe2 towards undesired rollover cyclometalation. The presence of the CuI center also enables facile transmetalation from electron-deficient tetraarylborate [B(ArF)4]- anion and mild C-H bond cleavage of a terminal alkyne, which was not observed in the absence of an electrophilic Cu center. The DFT study indicates that the role of Cu center acts as a binding site for alkyne substrate, while activating its terminal C-H bond.

Imine as a Linchpin Approach for Distal C(sp2)–H Functionalization

2020 ◽  
Author(s):  
Sukdev Bag ◽  
Sadhan Jana ◽  
Sukumar Pradhan ◽  
Suman Bhowmick ◽  
Nupur Goswami ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Bond Activation ◽  
Bond Formation ◽  
Ancillary Ligand ◽  
Significant Challenge ◽  
Site Selectivity ◽  
Directing Group ◽  
Covalently Linked ◽  
Complex Organic ◽  
Post Functionalization

<p>Despite the widespread applications of C–H functionalization, controlling site selectivity remains a significant challenge. Covalently attached directing group (DG) served as an ancillary ligand to ensure proximal <i>ortho</i>-, distal <i>meta</i>- and <i>para</i>-C-H functionalization over the last two decades. These covalently linked DGs necessitate two extra steps for a single C–H functionalization: introduction of DG prior to C–H activation and removal of DG post-functionalization. We introduce here a transient directing group for distal C(<i>sp<sup>2</sup></i>)-H functionalization <i>via</i> reversible imine formation. By overruling facile proximal C-H bond activation by imine-<i>N</i> atom, a suitably designed pyrimidine-based transient directing group (TDG) successfully delivered selective distal C-C bond formation. Application of this transient directing group strategy for streamlining the synthesis of complex organic molecules without any necessary pre-functionalization at the distal position has been explored.</p>

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