Catalytic, metal-free sulfonylcyanation of alkenes via visible light organophotoredox catalysis

2018 ◽  
Vol 54 (25) ◽  
pp. 3162-3165 ◽  
Author(s):  
Jianfeng Sun ◽  
Peng Li ◽  
Lei Guo ◽  
Fang Yu ◽  
Yu-Peng He ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Addition ◽  
Neutral Group ◽  
Group Transfer ◽  
Metal Free ◽  
Catalytic Metal

A catalytic, redox-neutral group transfer radical addition of olefins with tosyl cyanide via visible light-induced organophotoredox catalysis has been described.

Metal-Free Iodoperfluoroalkylation: Photocatalysis versus Frustrated Lewis Pair Catalysis

Synthesis ◽  
2020 ◽  
Vol 53 (01) ◽  
pp. 123-134
Author(s):  
Constantin Czekelius ◽  
Lucas Helmecke ◽  
Michael Spittler ◽  
Bernd M. Schmidt
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Reaction Pathways ◽  
Frustrated Lewis Pairs ◽  
Metal Free ◽  
Comprehensive Account ◽  
Frustrated Lewis Pair ◽  
Catalytic Metal ◽  
Lewis Pairs

A comparison of two catalytic, metal-free iodoperfluoro­alkylation protocols is presented. Frustrated Lewis pairs [ t Bu3P/B(C6F5)3] or phosphines/phosphites under visible light irradiation efficiently mediate the functionalization of non-activated alkenes and alkynes. A comprehensive account of the corresponding substrate scopes as well as insights into the mechanistic details of both reaction pathways are provided.

Transition metal-free, visible-light-mediated construction of α,β-diamino esters via decarboxylative radical addition at room temperature

2019 ◽  
Vol 6 (13) ◽  
pp. 2245-2249 ◽  
Author(s):  
Guibing Wu ◽  
Jingwen Wang ◽  
Chengyu Liu ◽  
Maolin Sun ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Radical Addition ◽  
Metal Free ◽  
Radical Coupling

A metal-free photoredox catalyzed decarboxylative radical coupling of free-carboxylic acids and glyoxylic oximes was developed to synthesize α,β-diamino acids.

Metal-free synthesis of ketones by visible-light induced aerobic oxidative radical addition of aryl hydrazines to alkenes

2017 ◽  
Vol 19 (13) ◽  
pp. 2941-2944 ◽  
Author(s):  
Ya Ding ◽  
Wenkai Zhang ◽  
Hao Li ◽  
Yunge Meng ◽  
Te Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Cost Effective ◽  
Radical Addition ◽  
Metal Free ◽  
Cost Effective Method

A green and cost-effective method has been developed for the conversion of alkenes to ketones under metal-free conditions.

Visible-light induced metal-free cascade Wittig/hydroalkylation reactions

2021 ◽  
Vol 23 (4) ◽  
pp. 1638-1641
Author(s):  
Pannan Miao ◽  
Ruining Li ◽  
Xianfeng Lin ◽  
Liangming Rao ◽  
Zhankui Sun
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Addition ◽  
Metal Free ◽  
Mild Conditions ◽  
Radical Approach

Through a relay olefination and radical addition process, we developed cascade Wittig/hydroalkylation reactions induced by visible light. This metal-free radical approach features mild conditions, robustness, and excellent functionality tolerance.

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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