Cp*Co(iii)-catalyzed vinylic C–H bond activation under mild conditions: expedient pyrrole synthesis via (3 + 2) annulation of enamides and alkynes

2016 ◽  
Vol 3 (7) ◽  
pp. 836-840 ◽  
Author(s):  
Dhanaji M. Lade ◽  
Amit B. Pawar
Keyword(s):  
Catalytic System ◽  
Reaction Temperature ◽  
Bond Activation ◽  
Mild Conditions ◽  
System P

Cobalt(iii)-catalyzed (3 + 2) oxidative annulation of enamides and alkynes for the synthesis of pyrroles has been developed under mild conditions and simple tuning of reaction temperature lead to the formation of bothN-Ac andN-H pyrroles under an exactly identical catalytic system.

Dawson-type polyoxometalate-based vacancies g-C3N4 composite-nanomaterials for efficient photocatalytic nitrogen fixation

2019 ◽  
Vol 6 (11) ◽  
pp. 3315-3326 ◽  
Author(s):  
Xiao-Hong Li ◽  
Wei-Lin Chen ◽  
Peng He ◽  
Ting Wang ◽  
Ding Liu ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Catalytic System ◽  
Defect Structure ◽  
Composite Nanomaterials ◽  
Self Healing ◽  
Mild Conditions ◽  
System P

POM@V-g-C3N4 show outstanding photocatalytic N2 fixation activities at mild conditions under illumination due to the excellent POM properties and rich defect structure. The reaction can form a self-healing, recyclable N2-fixing catalytic system.

Selective hydrodeoxygenation of biomass-derived furfural-acetone to prepare 1-octyl acetate

2019 ◽  
Vol 21 (16) ◽  
pp. 4532-4540 ◽  
Author(s):  
Xuyang Liu ◽  
Yanbing Li ◽  
Jin Deng ◽  
Yao Fu
Keyword(s):  
Catalytic System ◽  
One Pot ◽  
Mild Conditions ◽  
System P ◽  
Octyl Acetate ◽  
The One

A green and efficient catalytic system for the one-pot production of 1-octyl acetate from biomass-derived furfural-acetone under mild conditions was developed by selective hydrodeoxygenation over Pd/C and Sc(OTf)3 as a cocatalytic system.

Pt-Pd Nanoalloy for the Unprecedented Activation of Carbon-Fluorine Bond at Low Temperature

2019 ◽  
Author(s):  
Raghu Nath Dhital ◽  
keigo nomura ◽  
Yoshinori Sato ◽  
Setsiri Haesuwannakij ◽  
Masahiro Ehara ◽  
...  
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Dft Calculations ◽  
Bond Activation ◽  
Mild Conditions ◽  
Selective Transformation ◽  
Rate Determining Step ◽  
Highly Active ◽  
Harsh Conditions ◽  
Reaction Profile

Carbon-Fluorine (C-F) bonds are considered the most inert organic functionality and their selective transformation under mild conditions remains challenging. Herein, we report a highly active Pt-Pd nanoalloy as a robust catalyst for the transformation of C-F bonds into C-H bonds at low temperature, a reaction that often required harsh conditions. The alloying of Pt with Pd is crucial to activate C-F bond. The reaction profile kinetics revealed that the major source of hydrogen in the defluorinated product is the alcoholic proton of 2-propanol, and the rate-determining step is the reduction of the metal upon transfer of the <i>beta</i>-H from 2-propanol. DFT calculations elucidated that the key step is the selective oxidative addition of the O-H bond of 2-propanol to a Pd center prior to C-F bond activation at a Pt site, which crucially reduces the activation energy of the C-F bond. Therefore, both Pt and Pd work independently but synergistically to promote the overall reaction

Practical allylation with unactivated allylic alcohols under mild conditions

2021 ◽  
Author(s):  
Shuangshuang Li ◽  
Ju Qiu ◽  
Bowen Li ◽  
Zuolian Sun ◽  
Peizhong Xie ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Catalytic System ◽  
Allylic Alcohols ◽  
Mild Conditions ◽  
Accelerate Proton

A practical palladium/calcium catalytic system was developed for dehydrative allylation concerning unactivated allylic alcohols. EtOH solvent with H2O additive was identified as powerful media to accelerate proton transfer. That catalytic...

Insights into the electrochemical degradation of phenolic lignin model compounds in protic ionic liquid-water system

2021 ◽  
Author(s):  
Guangyong Liu ◽  
Qian Wang ◽  
Dongxia Yan ◽  
Yaqin Zhang ◽  
Chenlu Wang ◽  
...  
Keyword(s):  
Water System ◽  
Value Added ◽  
Electrochemical Degradation ◽  
Aryl Ether ◽  
Model Compounds ◽  
Protic Ionic Liquid ◽  
Lignin Model Compounds ◽  
Mild Conditions ◽  
System P ◽  
Lignin Model

Cleavage of aryl ether (Caryl-O) bonds is crucial for conversion and value-added utilization of lignin and its derivatives, but remains extremely challenging under mild conditions due to strong Caryl-O linkages....

Unprecedentedly high efficiency for photocatalytic conversion of methane to methanol over Au–Pd/TiO2 – what is the role of each component in the system?

2021 ◽  
Author(s):  
Xiaojiao Cai ◽  
Siyuan Fang ◽  
Yun Hang Hu
Keyword(s):  
Methane Conversion ◽  
High Efficiency ◽  
Mild Conditions ◽  
Highly Efficient ◽  
System P ◽  
Conversion Of Methane

Direct and highly efficient methane conversion to methanol under mild conditions is achieved via photocatalysis over Au–Pd/TiO2.

scholarly journals Pd/Ni-Catalyzed Germa-Suzuki coupling via dual Ge–F bond activation

2021 ◽  
Author(s):  
Hajime Kameo ◽  
Akihiro Mushiake ◽  
Tomohito Isasa ◽  
Hiroyuki Matsuzaka ◽  
Didier Bourissou
Keyword(s):  
Bond Activation ◽  
Suzuki Coupling ◽  
Mild Conditions ◽  
Dual Activation

Pd/Ni → Ge–F interactions supported by phosphine-chelation were found to trigger dual activation of Ge–F bonds under mild conditions.

Atom-transfer radical addition of fluoroalkyl bromides to alkenes via a photoredox/copper catalytic system

2021 ◽  
Author(s):  
Vladislav S. Kostromitin ◽  
Artem A. Zemtsov ◽  
Vladimir A. Kokorekin ◽  
Vitalij V. Levin ◽  
Alexander D. Dilman
Keyword(s):  
Catalytic System ◽  
Radical Addition ◽  
Atom Transfer ◽  
Alkyl Bromides ◽  
System P ◽  
Atom Transfer Radical Addition

A method for the addition of fluorinated alkyl bromides to alkenes is described.

Synthesis of 2-aminothiazoles from methylcarbonyl compounds using a Fe3O4 nanoparticle-N-halo reagent catalytic system

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64749-64755 ◽  
Author(s):  
Masoud Sadeghi ◽  
Javad Safari ◽  
Zohre Zarnegar
Keyword(s):  
Catalytic System ◽  
Fe3o4 Nanoparticle ◽  
Catalytic Systems ◽  
System P

An efficient protocol is developed for the synthesis of 2-aminothiazoles from unfunctionalized methylcarbonyl compounds using Fe3O4 nanoparticle-N-halo reagent catalytic systems.

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