Design and Synthesis of Alanine Triazole Ligands and Application in Promotion of Hydration, Allene Synthesis and Borrowing Hydrogen Reactions

2016 ◽  
Vol 358 (9) ◽  
pp. 1433-1439 ◽  
Author(s):  
Yongchun Yang ◽  
Anni Qin ◽  
Keyan Zhao ◽  
Dawei Wang ◽  
Xiaodong Shi
Keyword(s):  
Design And Synthesis ◽  
Borrowing Hydrogen ◽  
Hydrogen Reactions

Pyridine mediated transition-metal-free direct alkylation of anilines using alcohols via borrowing hydrogen conditions

2020 ◽  
Vol 56 (88) ◽  
pp. 13607-13610 ◽  
Author(s):  
Rajagopal Pothikumar ◽  
Venugopal T Bhat ◽  
Kayambu Namitharan
Keyword(s):  
Transition Metal ◽  
Traditional Approach ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Metal Free ◽  
Borrowing Hydrogen ◽  
Activation Of Alcohols ◽  
Catalyst Systems ◽  
Hydrogen Reactions

Herein, we report aza-aromatics based organic mediators as a readily accessible alternative to the traditional approach of using transition metal catalyst systems for the activation of alcohols in borrowing hydrogen reactions.

Immobilization of manganese dioxide nanoparticles on modified poly 2,4-dichlorostyrene microspheres: a highly efficient and recyclable catalyst for borrowing hydrogen reactions

2019 ◽  
Vol 6 (19) ◽  
pp. 3420-3427 ◽  
Author(s):  
Ye Qiu ◽  
Yilin Zhang ◽  
Lu Jin ◽  
Le Pan ◽  
Guangming Du ◽  
...  
Keyword(s):  
Manganese Dioxide ◽  
Recyclable Catalyst ◽  
Highly Efficient ◽  
Borrowing Hydrogen ◽  
Manganese Dioxide Nanoparticles ◽  
Hydrogen Reactions ◽  
Effective Carrier

Modified poly 2,4-dichlorostyrene microspheres were designed and synthesized, and were proved to be an effective carrier to synthesize supported manganese dioxide nanoparticles.

scholarly journals Shuttle Arylation by Rh(I) Catalyzed Reversible Carbon–Carbon Bond Activation of Unstrained Alcohols

2020 ◽  
Author(s):  
Marius D. R. Lutz ◽  
Valentina C. M. Gasser ◽  
Bill Morandi
Keyword(s):  
Bond Activation ◽  
Hydrogen Gas ◽  
Transfer Hydrogenation ◽  
Tertiary Alcohols ◽  
Carbon Carbon Bond ◽  
Borrowing Hydrogen ◽  
Insertion Mechanism ◽  
Elimination Mechanism ◽  
Catalytic Cleavage ◽  
Hydrogen Reactions

The advent of transfer hydrogenation and borrowing hydrogen reactions paved the way to manipulate simple alcohols in previously unthinkable manners and circumvent the need for hydrogen gas. Analogously, transfer hydrocarbylation could greatly increase the versatility of tertiary alcohols. However, this reaction remains unexplored because of the challenges associated with the catalytic cleavage of unactivated C–C bonds. Herein, we report a rhodium(I)-catalyzed shuttle arylation cleaving the C(sp<sup>2</sup>)–C(sp<sup>3</sup>) bond in unstrained triaryl alcohols via a redox-neutral <i>β</i>-carbon elimination mechanism. A selective transfer hydrocarbylation of substituted (hetero)aryl groups from tertiary alcohols to ketones was realized, employing benign alcohols as latent <i>C</i>-nucleophiles. All preliminary mechanistic experiments support a reversible <i>β</i>-carbon elimination/migratory insertion mechanism. In a broader context, this novel reactivity offers a new platform for the manipulation of tertiary alcohols in catalysis.

scholarly journals Synthesis of 4,5-Benzotropone Pi-Complexes of Iron, Rhodium and Iridium and Their Potential Use in Catalytic Borrowing Hydrogen Reactions

2020 ◽  
Author(s):  
Takuya Kodama ◽  
Yuki Kawashima ◽  
Zhirong Deng ◽  
Mamoru Tobisu
Keyword(s):  
Catalytic Activity ◽  
Metal Center ◽  
X Ray ◽  
Borrowing Hydrogen ◽  
Pi Complexes ◽  
Hydrogen Reactions ◽  
Potential Use

The synthesis of rhodium, iridium, and iron pi-complexes bearing 4,5-benzotropone ligands are reported. X-ray crystallographic analyses revealed that a tropone core coordinates to a metal center in a <i>eta</i><sup>4</sup> manner with a tub-form geometry. Some of the benzotropone p-complexes exhibited catalytic activity for the <i>N</i>-alkylation of aniline via borrowing hydrogen.

Iridium and copper supported on silicon dioxide as chemoselective catalysts for dehydrogenation and borrowing hydrogen reactions

2021 ◽  
Vol 505 ◽  
pp. 111516
Author(s):  
Guanxin Zhu ◽  
Zheng-Chao Duan ◽  
Haiyan Zhu ◽  
Minghui Qi ◽  
Dawei Wang
Keyword(s):  
Silicon Dioxide ◽  
Borrowing Hydrogen ◽  
Hydrogen Reactions
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