A heavy-metal-free desulfonylative Giese-type reaction of benzothiazole sulfones under visible-light conditions

2021 ◽  
Vol 57 (77) ◽  
pp. 9858-9861
Author(s):  
Tetsuya Sengoku ◽  
Daichi Ogawa ◽  
Haruka Iwama ◽  
Toshiyasu Inuzuka ◽  
Hidemi Yoda
Keyword(s):  
Heavy Metal ◽  
Visible Light ◽  
Blue Light ◽  
Light Conditions ◽  
Metal Free ◽  
Type Reaction

A heavy-metal-free desulfonylative Giese-type reaction has been achieved by using Hantzsch ester as a photoreductant under blue light.

Imine‐Based Covalent Organic Frameworks as Photocatalysts for Metal Free Oxidation Processes under Visible Light Conditions

ChemCatChem ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 4916-4922 ◽  
Author(s):  
Alicia Jiménez‐Almarza ◽  
Alberto López‐Magano ◽  
Leyre Marzo ◽  
Silvia Cabrera ◽  
Rubén Mas‐Ballesté ◽  
...  
Keyword(s):  
Visible Light ◽  
Covalent Organic Frameworks ◽  
Light Conditions ◽  
Oxidation Processes ◽  
Metal Free ◽  
Free Oxidation

scholarly journals Metal-free C–H sulfonamidation of pyrroles by visible light photoredox catalysis

2016 ◽  
Vol 52 (72) ◽  
pp. 10918-10921 ◽  
Author(s):  
Andreas Uwe Meyer ◽  
Anna Lucia Berger ◽  
Burkhard König
Keyword(s):  
Visible Light ◽  
Blue Light ◽  
Photoredox Catalysis ◽  
Metal Free

Blue light and catalytic amounts of an acridinium dye are sufficient for the C–H sulfamidation of pyrroles.

scholarly journals Synthesis of Xanthones, Thioxanthones and Acridones by a Metal-Free Photocatalytic Oxidation Using Visible Light and Molecular Oxygen

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 974
Author(s):  
Alejandro Torregrosa-Chinillach ◽  
Rafael Chinchilla
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Blue Light ◽  
Photocatalytic Oxidation ◽  
Photo Oxidation ◽  
Metal Free

9H-Xanthenes, 9H-thioxanthenes and 9,10-dihydroacridines can be easily oxidized to the corresponding xanthones, thioxanthones and acridones, respectively, by a simple photo-oxidation procedure carried out using molecular oxygen as oxidant under the irradiation of visible blue light and in the presence of riboflavin tetraacetate as a metal-free photocatalyst. The obtained yields are high or quantitative.

scholarly journals A simple ketone as an efficient metal-free catalyst for visible-light-mediated Diels–Alder and aza-Diels–Alder reactions

2019 ◽  
Vol 21 (8) ◽  
pp. 1916-1920 ◽  
Author(s):  
Jiri Kollmann ◽  
Yu Zhang ◽  
Waldemar Schilling ◽  
Tong Zhang ◽  
Daniel Riemer ◽  
...  
Keyword(s):  
Visible Light ◽  
Experimental Evidence ◽  
Homogeneous System ◽  
Alder Reaction ◽  
Diels Alder ◽  
Light Conditions ◽  
Metal Free ◽  
Diels Alder Reaction

An efficient metal-free homogeneous system has been developed for the Diels–Alder reaction between electron-rich dienophiles and dienes under visible-light conditions. The mechanism of this reaction has been proposed based on the experimental evidence.

Synthesis of highly fluorescent InP/ZnS small-core/thick-shell tetrahedral-shaped quantum dots for blue light-emitting diodes

2017 ◽  
Vol 5 (32) ◽  
pp. 8243-8249 ◽  
Author(s):  
Wei Shen ◽  
Haiyan Tang ◽  
Xiaolei Yang ◽  
Zengle Cao ◽  
Tai Cheng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Quantum Dots ◽  
Quantum Dot ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Thick Shell ◽  
Light Emitting ◽  
Metal Free ◽  
Small Core

Highly fluorescent InP/ZnS small-core/thick-shell quantum dots were synthesized for constructing heavy-metal-free blue quantum dot-light-emitting diodes.

scholarly journals Heavy-Metal-Free Fischer–Tropsch Type Reaction: Sequential Homologation of Alkylborane Using a Combination of CO and Hydrides as Methylene Source

2020 ◽  
Vol 142 (33) ◽  
pp. 14064-14068 ◽  
Author(s):  
Andreas Phanopoulos ◽  
Shrinwantu Pal ◽  
Takafumi Kawakami ◽  
Kyoko Nozaki
Keyword(s):  
Heavy Metal ◽  
Fischer Tropsch ◽  
Metal Free ◽  
Type Reaction

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.

Benzylamine-Free, Heavy-Metal-Free Synthesis of CL-20

2006 ◽  
Author(s):  
Robert D. Chapman ◽  
Richard A. Hollins ◽  
Thomas J. Groshens ◽  
David A. Nissan
Keyword(s):  
Heavy Metal ◽  
Metal Free

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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