ChemInform Abstract: New Access to H-Phosphonates via Metal-Catalyzed Phosphorus—Oxygen Bond Formation.

ChemInform ◽  
2008 ◽  
Vol 39 (1) ◽  
Author(s):  
Laetitia Coudray ◽  
Isabelle Abrunhosa-Thomas ◽  
Jean-Luc Montchamp
Keyword(s):  
Bond Formation ◽  
Metal Catalyzed ◽  
Oxygen Bond

scholarly journals New access to H-phosphonates via metal-catalyzed phosphorus–oxygen bond formation

2007 ◽  
Vol 48 (37) ◽  
pp. 6505-6508 ◽  
Author(s):  
Laëtitia Coudray ◽  
Isabelle Abrunhosa-Thomas ◽  
Jean-Luc Montchamp
Keyword(s):  
Bond Formation ◽  
Metal Catalyzed ◽  
Oxygen Bond

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.

Formation of Carbon-Oxygen Bond Mediated by Hypervalent Iodine Reagents Under Metal-free Conditions

2020 ◽  
Vol 17 ◽  
Author(s):  
Ayesha Jalil ◽  
Yaxin O Yang ◽  
Zhendong Chen ◽  
Rongxuan Jia ◽  
Tianhao Bi ◽  
...  
Keyword(s):  
Natural Products ◽  
Bond Formation ◽  
Building Blocks ◽  
Review Article ◽  
Hypervalent Iodine ◽  
Metal Free ◽  
Bioactive Natural Products ◽  
The Past ◽  
Oxygen Bond ◽  
Privileged Scaffolds

: Hypervalent iodine reagents are a class of non-metallic oxidants have been widely used in the construction of several sorts of bond formations. This surging interest in hypervalent iodine reagents is essentially due to their very useful oxidizing properties, combined with their benign environmental character and commercial availability from the past few decades ago. Furthermore, these hypervalent iodine reagents have been used in the construction of many significant building blocks and privileged scaffolds of bioactive natural products. The purpose of writing this review article is to explore all the transformations in which carbon-oxygen bond formation occurred by using hypervalent iodine reagents under metal-free conditions

scholarly journals Transition Metal-Catalyzed α-Position Carbon–Carbon Bond Formations of Carbonyl Derivatives

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 861 ◽  
Author(s):  
Ha-Eun Lee ◽  
Dopil Kim ◽  
Ahrom You ◽  
Myung Hwan Park ◽  
Min Kim ◽  
...  
Keyword(s):  
Transition Metal ◽  
Carbonyl Compounds ◽  
Bond Formation ◽  
Chiral Ligand ◽  
Catalytic Systems ◽  
Carbon Bond ◽  
Carbonyl Derivatives ◽  
Carbon Carbon Bond ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

α-Functionalization of carbonyl compounds in organic synthesis has traditionally been accomplished via classical enolate chemistry. As α-functionalized carbonyl moieties are ubiquitous in biologically and pharmaceutically valuable molecules, catalytic α-alkylations have been extensively studied, yielding a plethora of practical and efficient methodologies. Moreover, stereoselective carbon–carbon bond formation at the α-position of achiral carbonyl compounds has been achieved by using various transition metal–chiral ligand complexes. This review describes recent advances—in the last 20 years and especially focusing on the last 10 years—in transition metal-catalyzed α-alkylations of carbonyl compounds, such as aldehydes, ketones, imines, esters, and amides and in efficient carbon–carbon bond formations. Active catalytic species and ligand design are discussed, and mechanistic insights are presented. In addition, recently developed photo-redox catalytic systems for α-alkylations are described as a versatile synthetic tool for the synthesis of chiral carbonyl-bearing molecules.

Aryl—Aryl Bond Formation by Transition-Metal-Catalyzed Direct Arylation

ChemInform ◽  
2007 ◽  
Vol 38 (22) ◽  
Author(s):  
Dino Alberico ◽  
Mark E. Scott ◽  
Mark Lautens
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Arylation ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

Carbon-oxygen bond formation in electron-impact ions of acetylenic sulfoxides and sulfones

1970 ◽  
Vol 3 (2) ◽  
pp. 241-242 ◽  
Author(s):  
T. H. Kinstle ◽  
W. R. Oliver ◽  
L. A. Ochrymowycz
Keyword(s):  
Electron Impact ◽  
Bond Formation ◽  
Oxygen Bond

Phosphorus–oxygen bond formation on organo-capped tricobalt centres via phosphorus–hydrogen or phosphorus–phosphorus bond scission

1997 ◽  
pp. 3427-3434 ◽  
Author(s):  
Gillian A. Acum ◽  
Martin J. Mays ◽  
Paul R. Raithby ◽  
Harold R. Powell ◽  
Gregory A. Solan
Keyword(s):  
Bond Formation ◽  
Bond Scission ◽  
Oxygen Bond

ChemInform Abstract: A Sequential Metal-Catalyzed C-N Bond Formation in the Synthesis of 2-Amido-indoles.

ChemInform ◽  
2009 ◽  
Vol 40 (7) ◽  
Author(s):  
Pei-Yuan Yao ◽  
Yu Zhang ◽  
Richard P. Hsung ◽  
Kang Zhao
Keyword(s):  
Bond Formation ◽  
Metal Catalyzed
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