ChemInform Abstract: Hydrogen-Transfer-Mediated Direct β-Alkylation of Aryl-1,8-naphthyridines with Alcohols under Transition Metal Catalyst Free Conditions.

ChemInform ◽  
2016 ◽  
Vol 47 (27) ◽  
Author(s):  
Biao Xiong ◽  
Shudi Zhang ◽  
Huanfeng Jiang ◽  
Min Zhang
Keyword(s):  
Transition Metal ◽  
Hydrogen Transfer ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Catalyst Free

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.

scholarly journals Transition Metal Catalyst Free Cross-Coupling Reaction of Tertiary Propargylic Alcohols with Hetero-Areneboronic Acids

2021 ◽  
Author(s):  
Jian-Fei Bai ◽  
Jianbo Tang ◽  
Xiaolong Gao ◽  
Zhi-Jiang Jiang ◽  
Zhanghua Gao
Keyword(s):  
Transition Metal ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Propargylic Alcohols ◽  
Catalyst Free ◽  
Cross Coupling Reaction ◽  
Reaction Proceeds ◽  
Acid Catalyzed

We report a perfluorophenylboronic acid catalyzed cross coupling reaction of tertiary propargylic alcohols and hetero-areneboronic acids for valuable benzo[b]thiophene and cyclopenta[a]indene derivates. This coupling reaction proceeds efficiently with a wide array of substrates scope in up to 89% yield and excellent regioselectivity. A significant advantage of our protocol is the transition metal catalyst free and mild conditions needed. This strategy provides direct and facile access to medicinally important benzo[b]thiophene and cyclopenta[a]indene scaffold containing a quaternary carbon center.

scholarly journals Transition Metal Catalyst Free Cross-Coupling Reaction of Tertiary Propargylic Alcohols with Hetero-Areneboronic Acids

2022 ◽  
Author(s):  
Jian-Fei Bai ◽  
Jianbo Tang ◽  
Xiaolong Gao ◽  
Zhi-Jiang Jiang ◽  
Jia Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Propargylic Alcohols ◽  
Catalyst Free ◽  
Cross Coupling Reaction ◽  
Reaction Proceeds ◽  
Acid Catalyzed

We report a perfluorophenylboronic acid catalyzed cross coupling reaction of tertiary propargylic alcohols and hetero-areneboronic acids for valuable benzo[b]thiophene and cyclopenta[a]indene derivates. This coupling reaction proceeds efficiently with a wide array of substrates scope in up to 89% yield and excellent regioselectivity. A significant advantage of our protocol is the transition metal catalyst free and mild conditions needed. This strategy provides direct and facile access to medicinally important benzo[b]thiophene and cyclopenta[a]indene scaffold containing a quaternary carbon center.

scholarly journals Transition-Metal Catalyst Free Oxidative Radical Arylation of N-Methylpyrrole

ACS Omega ◽  
2017 ◽  
Vol 2 (8) ◽  
pp. 5000-5004 ◽  
Author(s):  
Esma Kocaoğlu ◽  
Muhammed A. Karaman ◽  
Hatun Tokgöz ◽  
Oktay Talaz
Keyword(s):  
Transition Metal ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Radical Arylation ◽  
Catalyst Free
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