Visible-light-promoted organic-dye-catalyzed three-component coupling of aldehydes, hydrazines and bromodifluorinated reagents

2018 ◽  
Vol 5 (6) ◽  
pp. 1003-1007 ◽  
Author(s):  
Jin-Xue Li ◽  
Lei Li ◽  
Ming-Dong Zhou ◽  
He Wang
Keyword(s):  
Visible Light ◽  
Organic Dye ◽  
Photoredox Catalysis ◽  
Three Component Coupling

α,α-Difluoroketone hydrazones have been synthesised from readily available aldehydes, hydrazines, and bromodifluorinated reagents via visible-light photoredox catalysis.

scholarly journals Visible light photooxidation of nitrate: the dawn of a nocturnal radical

2015 ◽  
Vol 51 (30) ◽  
pp. 6568-6571 ◽  
Author(s):  
T. Hering ◽  
T. Slanina ◽  
A. Hancock ◽  
U. Wille ◽  
B. König
Keyword(s):  
Visible Light ◽  
Organic Dye ◽  
Photoredox Catalysis ◽  
Nitrate Radicals ◽  
Nitrate Salts

Highly oxidizing nitrate radicals (NO3˙) are easily accessed from readily available nitrate salts by visible light photoredox catalysis using a purely organic dye as the catalyst and oxygen as the terminal 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.

Cooperative iodine and photoredox catalysis for direct oxidative lactonization of carboxylic acids

2019 ◽  
Vol 55 (7) ◽  
pp. 933-936 ◽  
Author(s):  
Thomas Duhamel ◽  
Kilian Muñiz
Keyword(s):  
Visible Light ◽  
Carboxylic Acids ◽  
Molecular Iodine ◽  
Organic Dye ◽  
Photoredox Catalysis ◽  
Cooperative Catalysis

C–H lactonization is enabled by visible light-promoted cooperative catalysis combining molecular iodine and an organic dye.

scholarly journals Visible-Light-Mediated Photocatalytic Oxidative C–C Bond Cleavage of Geminal Diazides: An Approach to Oxamates

SynOpen ◽  
2021 ◽  
Vol 05 (02) ◽  
pp. 152-157
Author(s):  
Duddu S. Sharada ◽  
Narenderreddy Katta ◽  
Arumugavel Murugan ◽  
Sonika Sharma
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Bond Cleavage ◽  
Organic Dye ◽  
Single Electron ◽  
Mechanistic Study ◽  
Single Electron Transfer ◽  
Photoredox Catalysis ◽  
The Past ◽  
Remarkable Progress

AbstractPhotoredox catalysis has received great attention in both academia and industry and remarkable progress has been made over the past decade. Now, it has been shown that a visible-light-mediated oxidative C–C bond cleavage of geminal diazides can be induced by organic dye catalysis for the synthesis of oxamates. A mechanistic study, confirmed by control experiments, indicates that this proceeds through single-electron transfer (SET). This methodology can be applied to convert a wide array of geminal diazides into oxamates.

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.

Enantioselective Radical Functionalization of Imines and Iminium Intermediates via Visible Light Photoredox Catalysis

Synthesis ◽  
2020 ◽  
Author(s):  
Jia-Jia Zhao ◽  
Hong-Hao Zhang ◽  
Shouyun Yu
Keyword(s):  
Visible Light ◽  
Asymmetric Synthesis ◽  
Carbonyl Compounds ◽  
Asymmetric Reduction ◽  
Chemical Transformations ◽  
Photoredox Catalysis ◽  
Radical Coupling ◽  
Mild Conditions ◽  
Iminium Ions ◽  
Radical Functionalization

Visible light photoredox catalysis has recently emerged as a powerful tool for the development of new and valuable chemical transformations under mild conditions. Visible-light promoted enantioselective radical transformations of imines and iminium intermediates provide new opportunities for the asymmetric synthesis of amines and asymmetric β-functionalization of unsaturated carbonyl compounds. In this review, the advance in the catalytic asymmetric radical functionalization of imines, as well as iminium intermediates, are summarized. 1 Introduction 2 The enantioselective radical functionalization of imines 2.1 Asymmetric reduction 2.2 Asymmetric cyclization 2.3 Asymmetric addition 2.4 Asymmetric radical coupling 3 The enantioselective radical functionalization of iminium ions 3.1 Asymmetric radical alkylation 3.2 Asymmetric radical acylation 4 Conclusion

Intermolecular Aminotrifluoromethylation of Alkenes by Visible-Light-Driven Photoredox Catalysis

2013 ◽  
Vol 15 (9) ◽  
pp. 2136-2139 ◽  
Author(s):  
Yusuke Yasu ◽  
Takashi Koike ◽  
Munetaka Akita
Keyword(s):  
Visible Light ◽  
Photoredox Catalysis ◽  
Visible Light Driven

Cross dehydrogenative coupling (CDC) of aldehydes with N-hydroxyimides by visible light photoredox catalysis

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44928-44932 ◽  
Author(s):  
Milan Dinda ◽  
Chandan Bose ◽  
Tridev Ghosh ◽  
Soumitra Maity
Keyword(s):  
Visible Light ◽  
Photoredox Catalysis ◽  
Dehydrogenative Coupling

A visible light mediated cross-dehydrogenative-coupling (CDC) reaction has been developed for the synthesis of N-hydroxyester derivatives from aldehydes and N-hydroxyimides.

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