Metal-free dehydrosulfurization of thioamides to nitriles under visible light

2020 ◽  
Vol 56 (38) ◽  
pp. 5151-5153 ◽  
Author(s):  
Tianxiao Xu ◽  
Tianpeng Cao ◽  
Qingyuan Feng ◽  
Shenlin Huang ◽  
Saihu Liao
Keyword(s):  
Visible Light ◽  
Organic Dye ◽  
Metal Free

A visible light-mediated dehydrosulfurization of thioamides to nitriles is demonstrated, using an organic dye as a photocatalyst and air as an oxidant.

Metal-free oxidative phosphinylation of aryl alkynes to β-ketophosphine oxides via visible-light photoredox catalysis

2016 ◽  
Vol 6 (2) ◽  
pp. 413-416 ◽  
Author(s):  
Mei-jie Bu ◽  
Guo-ping Lu ◽  
Chun Cai
Keyword(s):  
Visible Light ◽  
Organic Dye ◽  
Photoredox Catalysis ◽  
Metal Free ◽  
Mild Conditions ◽  
Aryl Alkynes

A visible-light-induced oxidative phosphinylation of arylacetylenes catalyzed by an inexpensive organic dye was demonstrated to be effective under mild conditions.

Synthesis of 6-substituted phenanthridines by metal-free, visible-light induced aerobic oxidative cyclization of 2-isocyanobiphenyls with hydrazines

2014 ◽  
Vol 16 (5) ◽  
pp. 2418-2421 ◽  
Author(s):  
Tiebo Xiao ◽  
Linyong Li ◽  
Guoliang Lin ◽  
Qile Wang ◽  
Ping Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxidative Cyclization ◽  
Organic Dye ◽  
Metal Free ◽  
Eosin B

Irradiation of hydrazines and 2-isocyanobiphenyls with visible-light in the presence of organic dye eosin B generates various 6-substituted phenanthridines in good yields.

Polyimides as metal-free catalysts for organic dye degradation in the presence peroxymonosulfate under visible light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (119) ◽  
pp. 98231-98240 ◽  
Author(s):  
Yufang Tao ◽  
Mingyu Wei ◽  
Dongsheng Xia ◽  
Aihua Xu ◽  
Xiaoxia Li
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Organic Dyes ◽  
Dye Degradation ◽  
Organic Dye ◽  
Light Irradiation ◽  
Metal Free ◽  
Organic Dye Degradation

Polyimide was demonstrated as a stable metal-free photocatalyst to activate peroxymonosulfate with visible light for the degradation of organic dyes.

A Visible-Light-Promoted Metal-Free Strategy towards Arylphosphonates: Organic-Dye-Catalyzed Phosphorylation of Arylhydrazines with Trialkylphosphites

2018 ◽  
Vol 360 (24) ◽  
pp. 4807-4813 ◽  
Author(s):  
Rui Li ◽  
Xiaolan Chen ◽  
Shengkai Wei ◽  
Kai Sun ◽  
Lulu Fan ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Dye ◽  
Metal Free

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.

Metal‐Free and Heterogeneous Photocatalytic Reduction of 4‐Nitroaniline by a Poly(Ethylene Glycol)‐Supported Eosin Dye under Visible‐Light Exposure

ChemCatChem ◽  
2019 ◽  
Vol 11 (14) ◽  
pp. 3307-3317
Author(s):  
Andreea L. Chibac ◽  
Violeta Melinte ◽  
Vlasta Brezová ◽  
Estelle Renard ◽  
Arnaud Brosseau ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Visible Light ◽  
Light Exposure ◽  
Photocatalytic Reduction ◽  
Poly Ethylene Glycol ◽  
Metal Free ◽  
Poly Ethylene

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.

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