Zeolites as Transition-Metal-Free Hydrogenation Catalysts:  A Theoretical Mechanistic Study

2000 ◽  
Vol 122 (11) ◽  
pp. 2613-2620 ◽  
Author(s):  
Stefan Senger ◽  
Leo Radom
Keyword(s):  
Transition Metal ◽  
Mechanistic Study ◽  
Hydrogenation Catalysts ◽  
Metal Free

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.

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.

Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

2019 ◽  
Author(s):  
Arumugavel Murugan ◽  
Venkata Nagarjuna Babu ◽  
Nagaraj Sabarinathan ◽  
Sharada Duddu. S
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Practical Approach ◽  
Hypervalent Iodine ◽  
Radical Mechanism ◽  
Photoredox Catalysis ◽  
Metal Free

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagent provides a practical approach for the present trifluoromethylation reaction and synthesis of a library of trifluoromethylated indazoles.

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