The transition-metal-catalyst-free oxidative homocoupling of organomanganese reagents prepared by the insertion of magnesium into organic halides in the presence of MnCl2·2LiCl

2014 ◽  
Vol 12 (39) ◽  
pp. 7800-7809 ◽  
Author(s):  
Zhihua Peng ◽  
Na Li ◽  
Xinyang Sun ◽  
Fang Wang ◽  
Lanjian Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Catalyst ◽  
One Pot ◽  
Transition Metal Catalyst ◽  
Catalyst Free ◽  
Organic Halides ◽  
Oxidative Homocoupling

An oxidative homocoupling of organomanganese reagents was performed in one pot without an additional transition-metal catalyst.

scholarly journals Transition Metal Catalyst‐Free, Base‐Promoted 1,2‐Additions of Polyfluorophenylboronates to Aldehydes and Ketones

2021 ◽  
Author(s):  
Zhiqiang Liu ◽  
Goutam Kumar Kole ◽  
Yudha P. Budiman ◽  
Ya-Ming Tian ◽  
Alexandra Friedrich ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Catalyst ◽  
Free Base ◽  
Transition Metal Catalyst ◽  
Catalyst Free ◽  
Aldehydes And Ketones

Visible Light and Hydroxynaphthylbenzimidazoline Promoted Transition-Metal-Catalyst-Free Desulfonylation of N-Sulfonylamides and N-Sulfonylamines

2018 ◽  
Vol 83 (18) ◽  
pp. 10813-10825 ◽  
Author(s):  
Eietsu Hasegawa ◽  
Yuto Nagakura ◽  
Norihiro Izumiya ◽  
Keisuke Matsumoto ◽  
Tsukasa Tanaka ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Catalyst Free

scholarly journals A combination of experimental and computational methods to study the reactions during a Lignin-First approach

2020 ◽  
Vol 92 (4) ◽  
pp. 631-639
Author(s):  
Ivan Kumaniaev ◽  
Elena Subbotina ◽  
Maxim V. Galkin ◽  
Pemikar Srifa ◽  
Susanna Monti ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Transfer ◽  
Transfer Hydrogenation ◽  
Metal Catalyst ◽  
Main Role ◽  
One Pot ◽  
Transition Metal Catalyst ◽  
Transition Metal Catalyzed ◽  
Catalyzed Reactions ◽  
Metal Catalyzed

AbstractCurrent pulping technologies only valorize the cellulosic fiber giving total yields from biomass below 50 %. Catalytic fractionation enables valorization of both cellulose, lignin, and, optionally, also the hemicellulose. The process consists of two operations occurring in one pot: (1) solvolysis to separate lignin and hemicellulose from cellulose, and (2) transition metal catalyzed reactions to depolymerize lignin and to stabilized monophenolic products. In this article, new insights into the roles of the solvolysis step as well as the operation of the transition metal catalyst are given. By separating the solvolysis and transition metal catalyzed hydrogen transfer reactions in space and time by applying a flow-through set-up, we have been able to study the solvolysis and transition metal catalyzed reactions separately. Interestingly, the solvolysis generates a high amount of monophenolic compounds by pealing off the end groups from the lignin polymer and the main role of the transition metal catalyst is to stabilize these monomers by transfer hydrogenation/hydrogenolysis reactions. The experimental data from the transition metal catalyzed transfer hydrogenation/hydrogenolysis reactions was supported by molecular dynamics simulations using ReaXFF.

Catalyst-free chemoselective conjugate addition and reduction of α,β-unsaturated carbonyl compounds via a controllable boration/protodeboronation cascade pathway

2018 ◽  
Vol 20 (1) ◽  
pp. 255-260 ◽  
Author(s):  
Xi Huang ◽  
Junjie Hu ◽  
Mengying Wu ◽  
Jiayi Wang ◽  
Yanqing Peng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Carbonyl Compounds ◽  
Conjugate Addition ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Catalyst Free

A transition-metal-catalyst-free method provides a useful and eco-friendly tool for the chemoselective conjugate addition and reduction of α,β-unsaturated carbonyl compounds.

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