scholarly journals Metal-free visible light photoredox enables generation of carbyne equivalents via phosphonium ylide C–H activation

2019 ◽  
Vol 10 (6) ◽  
pp. 1687-1691 ◽  
Author(s):  
Mrinmoy Das ◽  
Minh Duy Vu ◽  
Qi Zhang ◽  
Xue-Wei Liu
Keyword(s):  
Visible Light ◽  
Bond Formation ◽  
Formation Processes ◽  
New Approach ◽  
Carbon Bond ◽  
Metal Free ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
New Strategy

Phosphonium ylides have shown their synthetic usefulness in important carbon–carbon bond formation processes. Our new strategy employs phosphonium ylides as novel carbyne equivalents and features a new approach for constructing carbon–carbon bonds from alkenes.

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.

Palladium chloride catalyzed photochemical Heck reaction

2013 ◽  
Vol 91 (5) ◽  
pp. 348-351 ◽  
Author(s):  
Suresh B. Waghmode ◽  
Sudhir S. Arbuj ◽  
Bina N. Wani ◽  
C.S. Gopinath
Keyword(s):  
Visible Light ◽  
Heck Reaction ◽  
Palladium Nanoparticles ◽  
Bond Formation ◽  
Aryl Halides ◽  
Palladium Chloride ◽  
Carbon Bond ◽  
Excellent Yield ◽  
Carbon Carbon Bond ◽  
Uv Visible

PdCl2 catalyzed carbon–carbon bond formation (Heck reaction) between substituted aryl halides and olefins was carried out without a ligand, under irradiation with UV–visible light. The results demonstrated that UV–visible light accelerated the rate of the reaction, leading to an excellent yield of corresponding products. The recovered palladium nanoparticles could be thermally recycled several times. PdCl2 gave excellent conversion up to the fifth addition of substrate.

Cleavage of carbon–carbon bonds by radical reactions

2019 ◽  
Vol 48 (9) ◽  
pp. 2615-2656 ◽  
Author(s):  
Paramasivam Sivaguru ◽  
Zikun Wang ◽  
Giuseppe Zanoni ◽  
Xihe Bi
Keyword(s):  
Bond Cleavage ◽  
Radical Reactions ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
Cleavage Reactions

This review provides insights into the in situ generated radicals triggered carbon–carbon bond cleavage reactions.

Introduction of a (Ph3P)2Pt group into the rim of an open-cage fullerene by breaking a carbon–carbon bond

2021 ◽  
Vol 57 (79) ◽  
pp. 10218-10221
Author(s):  
Steven R. Gralinski ◽  
Mrittika Roy ◽  
Lilia M. Baldauf ◽  
Marilyn M. Olmstead ◽  
Alan L. Balch
Keyword(s):  
Platinum Atom ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
The Many

A remarkable open-cage fullerene with a four coordinate platinum atom incorporated into its rim has been prepared by cleavage of just one of the many carbon–carbon bonds of the fullerene.

Visible-light photocatalytic oxidation of 1,3-dicarbonyl compounds and carbon–carbon bond formation

2014 ◽  
Vol 1 (5) ◽  
pp. 551 ◽  
Author(s):  
Marion Daniel ◽  
Louis Fensterbank ◽  
Jean-Philippe Goddard ◽  
Cyril Ollivier
Keyword(s):  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Bond Formation ◽  
Dicarbonyl Compounds ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Visible Light Photocatalytic
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