scholarly journals Photocatalytic Synthesis of Tetra-Substituted Furans Promoted by Carbon Dioxide

2021 ◽  
Author(s):  
Ya-Ming Tian ◽  
Huaiju Wang ◽  
Ritu Ritu ◽  
Burkhard Koenig
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Visible Light ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Visible Light Driven ◽  
Substituted Furans ◽  
Photocatalytic Synthesis

We report a simple protocol for the transition metal-free, visible-light-driven conversion of 1,3-diketones to tetra-substituted furan skeleton compounds in carbon dioxide (CO2) atmosphere under mild conditions. It was found that...

Highly chemoselective deoxygenation of N-heterocyclic N-oxides under transition metal-free conditions

2021 ◽  
Vol 19 (16) ◽  
pp. 3735-3742
Author(s):  
Se Hyun Kim ◽  
Ju Hyeon An ◽  
Jun Hee Lee
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Eosin Y ◽  
Metal Free ◽  
Simple Protocol

Here, we provide an operationally simple protocol for the highly chemoselective deoxygenation of various functionalized N-heterocyclic N-oxides under visible light-mediated photoredox conditions with Na2-eosin Y as an organophotocatalyst.

Transition-Metal-Free Synthesis of Phenanthridinones through Visible-Light-Driven Oxidative C-H Amidation

2019 ◽  
Vol 2020 (10) ◽  
pp. 1496-1504 ◽  
Author(s):  
Kaoru Usami ◽  
Eiji Yamaguchi ◽  
Norihiro Tada ◽  
Akichika Itoh
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Metal Free ◽  
Visible Light Driven

Photocatalytic transition-metal-free direct 3-alkylation of 2-aryl-2H-indazoles in dimethyl carbonate

2021 ◽  
Author(s):  
Chunhua Ma ◽  
Zhiwen Feng ◽  
Jing Li ◽  
Dandan Zhang ◽  
Wei Li ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Dimethyl Carbonate ◽  
Light Irradiation ◽  
Alkylation Reaction ◽  
Metal Free ◽  
Mild Conditions

A general transition-metal-free photocatalytic decarboxylative 3-alkylation reaction of 2-aryl-2H-indazoles was developed under visible-light irradiation under mild conditions.

Visible-Light-Driven Phosphonoalkylation of Alkenes

Synlett ◽  
2021 ◽  
Vol 32 (04) ◽  
pp. 378-382
Author(s):  
Yue-Ming Jiang ◽  
Jie Liu ◽  
Qiang Fu ◽  
Yu-Ming Yu ◽  
Da-Gang Yu
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Functional Group ◽  
Reaction Conditions ◽  
Metal Free ◽  
Alkyl Sulfonates ◽  
Visible Light Driven ◽  
High Yields

AbstractPhosphonylation of alkenes is important for the generation of valuable organophosphines. However, redox-neutral difunctionalization of alkenes with readily available H-P(O) compounds remains underdeveloped. Herein, we report the first visible-light-driven redox-neutral phosphonoalkylation of alkenes. A variety of organophosphorus-containing three-membered carbocyclic scaffolds are synthesized from alkene-bearing alkyl sulfonates with H-P(O) compounds. The transition-metal-free protocol displays good functional group tolerance, broad substrate scope, high yields, and mild reaction conditions.

scholarly journals Metal-free visible-light-enabled vicinal trifluoromethyl dithiolation of unactivated alkenes

2021 ◽  
Vol 17 ◽  
pp. 551-557
Author(s):  
Xiaojuan Li ◽  
Qiang Zhang ◽  
Weigang Zhang ◽  
Jinzhu Ma ◽  
Yi Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Complex Molecules ◽  
Radical Process ◽  
Metal Free ◽  
Mild Conditions

The difunctionalization of alkenes involving a trifluoromethylthio group (SCF3) for the conversion of versatile and readily available olefins into structurally more complex molecules has been successfully studied. However, the disproportionate dithiolation of alkenes is unknown. Herein, a transition-metal-free protocol is presented for the vicinal trifluoromethylthio–thiolation of unactivated alkenes via a radical process under mild conditions with a broad substrate scope and excellent tolerance.

Visible light driven efficient metal free single atom catalyst supported on nanoporous carbon nitride for nitrogen fixation

2019 ◽  
Vol 21 (23) ◽  
pp. 12346-12352 ◽  
Author(s):  
Kalishankar Bhattacharyya ◽  
Ayan Datta
Keyword(s):  
Nitrogen Fixation ◽  
Visible Light ◽  
Carbon Nitride ◽  
Industrial Applications ◽  
Chemical Processes ◽  
Single Atom ◽  
Metal Free ◽  
Mild Conditions ◽  
Visible Light Driven ◽  
Production Of Ammonia

The production of ammonia (NH3), an important carbon-free chemical, through nitrogen (N2) fixation under mild conditions, is one of the most challenging and attractive chemical processes for industrial applications.

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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