scholarly journals Computational study on palladium-catalyzed alkenylation of remote δ-C(sp3)–H bonds with alkynes: a new understanding of mechanistic insight and origins of site-selectivity

RSC Advances ◽  
2018 ◽  
Vol 8 (53) ◽  
pp. 30186-30190 ◽  
Author(s):  
Hui-Min Yan ◽  
Ye Tian ◽  
Niu Li ◽  
Rong Chang ◽  
Zhu-Xia Zhang ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Computational Study ◽  
Mechanistic Insight ◽  
Site Selectivity ◽  
Palladium Catalyzed

Palladium-catalyzed alkenylation of δ-C(sp3)–H bonds with alkynes was conducted by DFT calculations, showing that the dimeric Pd2(OAc)4 mechanism reproduces experimental observations well.

Mechanism and origins of stereo- and enantioselectivities of palladium-catalyzed hydroamination of racemic internal allenes via dynamic kinetic resolution: a computational study

2020 ◽  
Vol 7 (12) ◽  
pp. 1502-1511 ◽  
Author(s):  
Zhenzhen Wu ◽  
Mei Zhang ◽  
Yu Shi ◽  
Genping Huang
Keyword(s):  
Dft Calculations ◽  
Kinetic Resolution ◽  
Computational Study ◽  
Dynamic Kinetic Resolution ◽  
Palladium Catalyzed

DFT calculations were performed to investigate the Pd-catalyzed hydroamination of racemic internal allenes with pyrazoles.

Mechanistic Insight into Palladium-Catalyzed Carbocyclization-Functionalization of Bisallene: A Computational Study

ChemCatChem ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 1228-1237 ◽  
Author(s):  
Jing Zhang ◽  
Chunhui Shan ◽  
Kang Lv ◽  
Lei Zhu ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Computational Study ◽  
Mechanistic Insight ◽  
Palladium Catalyzed ◽  
Insight Into

scholarly journals Ligand and solvent control of selectivity in the C–H activation of a pyridylimine-substituted 1-naphthalene; a combined synthetic and computational study

2018 ◽  
Vol 47 (33) ◽  
pp. 11680-11690
Author(s):  
Rena Simayi ◽  
Simone M. Gillbard ◽  
Warren B. Cross ◽  
Eric G. Hope ◽  
Kuldip Singh ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Computational Study ◽  
Site Selectivity ◽  
Solvent Control ◽  
Experimental Findings ◽  
Chloride Salts ◽  
Substituted 1

The site-selectivity of C–H activation in a 1-substituted naphthalene is explored using palladium(ii) chloride salts; the experimental findings are fully supported by DFT calculations.

Palladium-catalyzed C–H activation of anisole with electron-deficient auxiliary ligands: a mechanistic investigation

2020 ◽  
Vol 18 (30) ◽  
pp. 5857-5866 ◽  
Author(s):  
Xinyu Xu ◽  
Kezhi Chen
Keyword(s):  
Dft Calculations ◽  
Site Selectivity ◽  
Mechanistic Investigation ◽  
Palladium Catalyzed

In this work, the experimentally observed site-selectivity and ligand choice of Yu's meta-arylation reaction were rationalized through DFT calculations.

Theoretical and experimental studies of palladium-catalyzed site-selective C(sp3)−H bond functionalization enabled by transient ligands

2017 ◽  
Author(s):  
Haibo Ge ◽  
Lei Pan ◽  
Piaoping Tang ◽  
Ke Yang ◽  
Mian Wang ◽  
...  
Keyword(s):  
Bond Activation ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
Bond Functionalization ◽  
Aliphatic Ketones ◽  
Site Selectivity ◽  
Mechanistic Investigation ◽  
Palladium Catalyzed ◽  
Metal Catalyzed ◽  
Site Selective

Transition metal-catalyzed selective C–H bond functionalization enabled by transient ligands has become an extremely attractive topic due to its economical and greener characteristics. However, catalytic pathways of this reaction process on unactivated sp<sup>3</sup> carbons of reactants have not been well studied yet. Herein, detailed mechanistic investigation on Pd-catalyzed C(sp<sup>3</sup>)–H bond activation with amino acids as transient ligands has been systematically conducted. The theoretical calculations showed that higher angle distortion of C(sp2)-H bond over C(sp3)-H bond and stronger nucleophilicity of benzylic anion over its aromatic counterpart, leading to higher reactivity of corresponding C(sp<sup>3</sup>)–H bonds; the angle strain of the directing rings of key intermediates determines the site-selectivity of aliphatic ketone substrates; replacement of glycine with β-alanine as the transient ligand can decrease the angle tension of the directing rings. Synthetic experiments have confirmed that β-alanine is indeed a more efficient transient ligand for arylation of β-secondary carbons of linear aliphatic ketones than its glycine counterpart.<br><br>

scholarly journals A Palladium-Catalyzed Oxa-(4+4)-Cycloaddition Strategy Towards Oxazocine Scaffolds

Synlett ◽  
2021 ◽  
Author(s):  
Julian Garrec ◽  
Alexis Archambeau ◽  
Anaïs Scuiller ◽  
Xueyang Liu ◽  
Marie Cordier
Keyword(s):  
Dft Calculations ◽  
Palladium Catalyzed

AbstractA Pd-catalyzed oxa-(4+4)-cycloaddition between 1-azadienes and (2-hydroxymethyl)allyl carbonates is described. Aurone-derived azadienes furnished polycyclic 1,5-oxazocines in good yields. Interestingly, linear azadienes have also been involved and yielded monocyclic heterocycles with complete regioselectivity. DFT calculations were carried out to gain insight on this observation.

scholarly journals The Activating Effect of Strong Acid for Pd-Catalyzed Directed C–H Activation by Concerted Metalation-Deprotonation Mechanism

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4083
Author(s):  
Heming Jiang ◽  
Tian-Yu Sun
Keyword(s):  
Activation Energy ◽  
Dft Calculations ◽  
Energy Barrier ◽  
Computational Study ◽  
Strong Acid ◽  
Activation Energy Barrier ◽  
Pd Catalysts ◽  
Acid Ligand ◽  
Strong Acids

A computational study on the origin of the activating effect for Pd-catalyzed directed C–H activation by the concerted metalation-deprotonation (CMD) mechanism is conducted. DFT calculations indicate that strong acids can make Pd catalysts coordinate with directing groups (DGs) of the substrates more strongly and lower the C–H activation energy barrier. For the CMD mechanism, the electrophilicity of the Pd center and the basicity of the corresponding acid ligand for deprotonating the C–H bond are vital to the overall C–H activation energy barrier. Furthermore, this rule might disclose the role of some additives for C–H activation.

Relating voltage and thermal safety in Li-ion battery cathodes: a high-throughput computational study

2015 ◽  
Vol 17 (8) ◽  
pp. 5942-5953 ◽  
Author(s):  
Anubhav Jain ◽  
Geoffroy Hautier ◽  
Shyue Ping Ong ◽  
Stephen Dacek ◽  
Gerbrand Ceder
Keyword(s):  
Dft Calculations ◽  
High Throughput ◽  
High Voltage ◽  
Cathode Materials ◽  
Inverse Relationship ◽  
Computational Study ◽  
Li Ion Battery ◽  
Thermal Safety ◽  
Li Ion

High voltage and high thermal safety are desirable characteristics of cathode materials, but difficult to achieve simultaneously DFT calculations on >1400 Li ion battery cathode materials indicate a complex inverse relationship between voltage and thermal safety.

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