Carbon–phosphorus triple bond formation through multiple bond metathesis of an anionic niobium phosphide with carbon dioxide

Polyhedron ◽  
2012 ◽  
Vol 32 (1) ◽  
pp. 10-13 ◽  
Author(s):  
Ivo Krummenacher ◽  
Christopher C. Cummins
Keyword(s):  
Carbon Dioxide ◽  
Triple Bond ◽  
Multiple Bond ◽  
Bond Formation

Carbon Dioxide-Mediated C(sp2)–H Arylation of Primary and Secondary Benzylamines

2018 ◽  
Author(s):  
Mohit Kapoor ◽  
Pratibha Chand-Thakuri ◽  
Michael Young
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Bond Activation ◽  
Bond Formation ◽  
Carbon Bond ◽  
Chelate Effect ◽  
Free Amine ◽  
Carbon Carbon Bond ◽  
New Strategy ◽  
Metal Catalyzed

Carbon-carbon bond formation by transition metal-catalyzed C–H activation has become an important strategy to fabricate new bonds in a rapid fashion. Despite the pharmacological importance of <i>ortho</i>-arylbenzylamines, however, effective <i>ortho</i>-C–C bond formation from C–H bond activation of free primary and secondary benzylamines using Pd<sup>II</sup> remains an outstanding challenge. Presented herein is a new strategy for constructing <i>ortho</i>-arylated primary and secondary benzylamines mediated by carbon dioxide (CO<sub>2</sub>). The use of CO<sub>2</sub> is critical to allowing this transformation to proceed under milder conditions than previously reported, and that are necessary to furnish free amine products that can be directly used or elaborated without the need for deprotection. In cases where diarylation is possible, a chelate effect is demonstrated to facilitate selective monoarylation.

C−C Bond Formation of Mg‐ and Zn‐Activated Carbon Dioxide

2018 ◽  
Vol 24 (18) ◽  
pp. 4710-4717 ◽  
Author(s):  
Glenn B. S. Miller ◽  
Einar Uggerud
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Bond Formation

scholarly journals Catalytic Conversion of Carbon Dioxide through C-N Bond Formation

Molecules ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 182 ◽  
Author(s):  
Jing-Yuan Li ◽  
Qing-Wen Song ◽  
Kan Zhang ◽  
Ping Liu
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Mechanism ◽  
Bond Formation ◽  
Catalytic Efficiency ◽  
Chemical Fixation ◽  
Catalytic Systems ◽  
Formation Reaction ◽  
Metal Free ◽  
The Past ◽  
Regulatory Strategies

From the viewpoint of green chemistry and sustainable development, it is of great significance to synthesize chemicals from CO2 as C1 source through C-N bond formation. During the past several decade years, many studies on C-N bond formation reaction were involved, and many efforts have been made on the theory. Nevertheless, several great challenges such as thermodynamic limitation, low catalytic efficiency and selectivity, and high pressure etc. are still suffered. Herein, recent advances are highlighted on the development of catalytic methods for chemical fixation of CO2 to various chemicals through C-N bond formation. Meanwhile, the catalytic systems (metal and metal-free catalysis), strategies and catalytic mechanism are summarized and discussed in detail. Besides, this review also covers some novel synthetic strategies to urethanes based on amines and CO2. Finally, the regulatory strategies on functionalization of CO2 for N-methylation/N-formylation of amines with phenylsilane and heterogeneous catalysis N-methylation of amines with CO2 and H2 are emphasized.

H2-Generation from Alcohols by the MOF-Based Noble Metal-Free Photocatalyst Ni/CdS/TiO2@MIL-101

2019 ◽  
Vol 72 (10) ◽  
pp. 842 ◽  
Author(s):  
Dominic Tilgner ◽  
Mara Klarner ◽  
Sebastian Hammon ◽  
Martin Friedrich ◽  
Andreas Verch ◽  
...  
Keyword(s):  
Noble Metal ◽  
Metal Organic Framework ◽  
Multiple Bond ◽  
Bond Formation ◽  
Metal Free ◽  
Fossil Carbon ◽  
Gas Atmosphere ◽  
Metal Organic ◽  
Hydrogen Liberation ◽  
Activation Of Alcohols

The synthesis of important classes of chemical compounds from alcohols helps to conserve Earth’s fossil carbon resources, since alcohols can be obtained from indigestible and abundantly available biomass. The utilisation of visible light for the activation of alcohols permits alcohol-based C–N and C–C bond formation under mild conditions inaccessible with thermally operating hydrogen liberation catalysts. Herein, we report on a noble metal-free photocatalyst able to split alcohols into hydrogen and carbonyl compounds under inert gas atmosphere without the requirement of electron donors, additives, or aqueous reaction media. The reusable photocatalyst mediates C–N multiple bond formation using the oxidation of alcohols and subsequent coupling with amines. The photocatalyst consists of a CdS/TiO2 heterojunction decorated with co-catalytic Ni nanoparticles and is prepared on size-optimised colloidal metal–organic framework (MOF) crystallites.

Sign in / Sign up

Export Citation Format

Share Document