scholarly journals Visible light mediated metal-free thiol–yne click reaction

2016 ◽  
Vol 7 (11) ◽  
pp. 6740-6745 ◽  
Author(s):  
Sergey S. Zalesskiy ◽  
Nikita S. Shlapakov ◽  
Valentine P. Ananikov
Keyword(s):  
Visible Light ◽  
Click Reaction ◽  
Eosin Y ◽  
Metal Free ◽  
Free Thiol ◽  
3D Printed

Efficient metal-free photoredox pathway to the thiol–yne click reaction is described using Eosin Y as a catalyst and dedicated 3D-printed photoreactor.

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.

scholarly journals Eosin Y-catalyzed visible-light-mediated aerobic oxidative cyclization of N,N-dimethylanilines with maleimides

2015 ◽  
Vol 11 ◽  
pp. 425-430 ◽  
Author(s):  
Zhongwei Liang ◽  
Song Xu ◽  
Wenyan Tian ◽  
Ronghua Zhang
Keyword(s):  
Visible Light ◽  
Oxidative Cyclization ◽  
Eosin Y ◽  
Efficient Synthesis ◽  
One Pot ◽  
Bond Functionalization ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Strategy ◽  
Air Atmosphere

A novel and simple strategy for the efficient synthesis of the corresponding tetrahydroquinolines from N,N-dimethylanilines and maleimides using visible light in an air atmosphere in the presence of Eosin Y as a photocatalyst has been developed. The metal-free protocol involves aerobic oxidative cyclization via sp3 C–H bond functionalization process to afford good yields in a one-pot procedure under mild conditions.

Metal-Free Regioselective Alkylation of Imidazo[1,2-a]pyridines with N-Hydroxyphthalimide Esters under Organic Photoredox Catalysis

Synlett ◽  
2020 ◽  
Vol 31 (04) ◽  
pp. 363-368 ◽  
Author(s):  
Can Jin ◽  
Bin Sun ◽  
Tengwei Xu ◽  
Liang Zhang ◽  
Rui Zhu ◽  
...  
Keyword(s):  
Visible Light ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Eosin Y ◽  
Photoredox Catalysis ◽  
Mechanistic Studies ◽  
Metal Free ◽  
Regioselective Alkylation ◽  
Decarboxylative Coupling ◽  
Aliphatic Carboxylic Acids

A visible-light-induced direct C–H alkylation of imidazo[1,2-a]pyridines has been developed. It proceeds at room temperature by employing inexpensive Eosin Y as a photocatalyst and alkyl N-hydroxyphthalimide (NHP) esters as alkylation reagents. A variety of NHP esters derived from aliphatic carboxylic acids (primary, secondary, and tertiary) were tolerated in this protocol, giving the corresponding C-5-alkylated products in moderate to excellent yields. Mechanistic studies indicate that a radical decarboxylative coupling pathway was involved in this process.

Synthesis of 6-Thiocyanatophenanthridines by Visible-Light- and Air-Promoted Radical Thiocyanation of 2-Isocyanobiphenyls

Synlett ◽  
2017 ◽  
Vol 29 (02) ◽  
pp. 176-180 ◽  
Author(s):  
Manjula Singh ◽  
Arvind Yadav ◽  
Lal Yadav ◽  
R. Singh
Keyword(s):  
Natural Resources ◽  
Visible Light ◽  
Room Temperature ◽  
Atmospheric Oxygen ◽  
Ammonium Thiocyanate ◽  
Radical Cyclization ◽  
Eosin Y ◽  
One Pot ◽  
Metal Free

A convenient, efficient, and metal-free synthesis of 6-thiocyanatophenanthridines by visible-light- and air-mediated, eosin Y-catalyzed, sequential radical cyclization and aromatization of 2-isocyanobiphenyls with ammonium thiocyanate is reported. Advantageously, the protocol utilizes inexpensive, clean, and sustainable natural resources such as visible light and atmospheric oxygen at room temperature in a one-pot procedure.

A noble-metal-free photocatalytic hydrogen production system based on cobalt(iii) complex and eosin Y-sensitized TiO2

RSC Advances ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 1852-1858 ◽  
Author(s):  
Mingcai Yin ◽  
Shuang Ma ◽  
Chaojun Wu ◽  
Yaoting Fan
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Visible Light Irradiation ◽  
Production System ◽  
Homogeneous System ◽  
Light Irradiation ◽  
Eosin Y ◽  
Metal Free

With CoL2 as cocatalyst and eosin Y as sensitizer, the noble-metal-free heterogeneous CoL2/TiO2 system shows much efficient and more stable hydrogen evolution activity than that of the homogeneous system under visible light irradiation.

Metal free thiol–maleimide ‘Click’ reaction as a mild functionalisation strategy for degradable polymers

2008 ◽  
pp. 5158 ◽  
Author(s):  
Ryan J. Pounder ◽  
Matthew J. Stanford ◽  
Paul Brooks ◽  
Stephen P. Richards ◽  
Andrew P. Dove
Keyword(s):  
Click Reaction ◽  
Degradable Polymers ◽  
Metal Free ◽  
Free Thiol

Investigating eosin Y as a photocatalyst for the radical-dependent activity-based probing of deubiquitinating enzymes

2021 ◽  
Vol 19 (10) ◽  
pp. 2177-2181
Author(s):  
Neil C. Taylor ◽  
Joanna F. McGouran
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Deubiquitinating Enzymes ◽  
Protein Thiol ◽  
Free Oxygen ◽  
Ene Reaction ◽  
Metal Free ◽  
System P ◽  
Dependent Activity

Assessment of the eosin Y initiated protein–protein thiol–ene reaction in a metal-free, oxygen-tolerant, visible-light mediated system.

scholarly journals Selective removal of toxic organic dyes using Trӧger base-containing sulfone copolymers made from a metal-free thiol-yne click reaction followed by oxidation

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 21170-21178
Author(s):  
Noorullah Baig ◽  
Suchetha Shetty ◽  
Moustafa Sherief Moustafa ◽  
Saleh Al-Mousawi ◽  
Bassam Alameddine
Keyword(s):  
Methylene Blue ◽  
Selective Oxidation ◽  
Removal Efficiency ◽  
Organic Dyes ◽  
Click Reaction ◽  
Selective Removal ◽  
Metal Free ◽  
Free Thiol ◽  
Base Units

Copolymers TCP1–3 with Trӧger's base units and aryl thioether groups were made via a click reaction. Selective oxidation of the thioethers into sulfone groups afforded TCP4–6 which display up to 100% removal efficiency of methylene blue from water.

Visible‐Light‐Promoted Synthesis of Fusesd Imidazoheterocycle by Eosin Y under Metal‐Free and Solvent‐Free Conditions

2021 ◽  
Vol 6 (48) ◽  
pp. 13982-13991
Author(s):  
Himanshu Kumar Singh ◽  
Arsala Kamal ◽  
Savita Kumari ◽  
Suresh Kumar Maury ◽  
Ambuj Kumar Kushwaha ◽  
...  
Keyword(s):  
Visible Light ◽  
Solvent Free ◽  
Eosin Y ◽  
Metal Free ◽  
Solvent Free Conditions
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