Toward a Low-Barrier Transition-Metal-Free Catalysis of Hydrogenation Reactions:  A Theoretical Mechanistic Study of HAlX4-Catalyzed Hydrogenations of Ethene (X = F, Cl, and Br)

2000 ◽  
Vol 104 (31) ◽  
pp. 7375-7385 ◽  
Author(s):  
Stefan Senger ◽  
Leo Radom
Keyword(s):  
Transition Metal ◽  
Mechanistic Study ◽  
Metal Free ◽  
Hydrogenation Reactions

scholarly journals Mechanistic Study on the Reaction of pinB-BMes2 with Alkynes Based on Experimental Investigation and DFT Calculations: Gradual Change of Mechanism Depending on the Substituent

2021 ◽  
Author(s):  
Linlin Wu ◽  
Chiemi Kojima ◽  
Ka Ho Lee ◽  
Shogo Morisako ◽  
Zhenyang Lin ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Transition Metal ◽  
Dft Calculations ◽  
Kinetic Analysis ◽  
Reaction Rate ◽  
Mechanistic Study ◽  
Isomer Ratio ◽  
Gradual Change ◽  
Isomeric Mixture ◽  
Metal Free

Transition-metal free direct and base-catalyzed 1,2-diborations of arylacetylenes using pinB-BMes2 provided syn/anti-isomeric mixture of diborylalkenes. The kinetic analysis showed that the reaction rate and isomer ratio were affected by reaction...

Transition-metal-free polycyclic indoline formation via a free radical pathway: a computational mechanistic study

2020 ◽  
Vol 139 (3) ◽  
Author(s):  
Chenguang Luo ◽  
Lin Lu ◽  
Lin Zhang ◽  
Zuoyin Yang ◽  
Min Pu ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Mechanistic Study ◽  
Metal Free

Lactamization of sp2 C–H bonds with CO2 under transition-metal-free and redox-neutral conditions: a computational mechanistic study

2018 ◽  
Vol 5 (14) ◽  
pp. 2189-2201 ◽  
Author(s):  
Weiyi Li ◽  
Caiqin Li ◽  
Yajing Lyu
Keyword(s):  
Transition Metal ◽  
Stage Ii ◽  
Mechanistic Study ◽  
Primary Role ◽  
Metal Free ◽  
Neutral Conditions

Bases play the primary role in Stages (I) and (III). CO2 serves as an atomic oxidant [O] acceptor in Stage (II).

Visible-Light Photoredox-catalyzed Decarboxylative α-tertiary butylation of C(sp3)−H Bond of N-aryl tetrahydroisoquinolines with Pivalic acid under Transition-metal-free Conditions

Synlett ◽  
2021 ◽  
Author(s):  
Li Sun ◽  
Yicheng Zhang ◽  
jie liu ◽  
Pinhua Li
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Functional Groups ◽  
Pivalic Acid ◽  
Mechanistic Study ◽  
Radical Process ◽  
Metal Free

A transition-metal-free visible-light photoredox-catalyzed decarboxylative alkylation of benzylic C-(sp3)−H bonds of N-aryl tetrahydroisoquinolines is reported. The developed methodology tolerates various functional groups and proceeds smoothly without the requirement of stoichiometric oxidants. A preliminary mechanistic study indicated that a radical process is involved in the reaction.

Transition-metal-free persulfuration to construct unsymmetrical disulfides and mechanistic study of the sulfur redox process

2015 ◽  
Vol 51 (20) ◽  
pp. 4208-4211 ◽  
Author(s):  
Xiao Xiao ◽  
Minghao Feng ◽  
Xuefeng Jiang
Keyword(s):  
Natural Products ◽  
Transition Metal ◽  
Redox Process ◽  
Biologically Active ◽  
New Method ◽  
Mechanistic Study ◽  
Metal Free ◽  
Active Moiety

A sulfur redox process has been developed between sulfinate and thiosulfate, which efficiently affords diverse unsymmetrical disulfides and provides a new method to modify pharmaceuticals and natural products with this biologically active moiety without extra oxidant or reductant.

Synthesis and Applications of Chiral Bicyclic Bisborane Catalysts

Synthesis ◽  
2021 ◽  
Author(s):  
Zhao-Ying Yang ◽  
Ming Zhang ◽  
Xiao-Chen Wang
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Asymmetric Hydrogenation ◽  
Acid Catalysts ◽  
Frustrated Lewis Pairs ◽  
Lewis Acid Catalysts ◽  
Lewis Bases ◽  
Metal Free ◽  
Hydrogenation Reactions ◽  
Acid Catalyzed

The development of chiral borane Lewis acid catalysts opened the door for transition-metal-free catalyzed asymmetric organic reactions. Herein, we have summarized our work on the preparation of two classes of novel chiral bicyclic bisborane Lewis acid catalysts derived from C2-symmetric [3.3.0] dienes and [4.4] dienes, respectively. These catalysts not only form frustrated Lewis pairs with Lewis bases to catalyze asymmetric hydrogenation reactions but also activate Lewis basic functional groups in traditional Lewis acid catalyzed asymmetric reactions.

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

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