scholarly journals Decarboxylative 1,4-Carbocyanation of 1,3-Enynes to Access Tetra-substituted Allenes via Copper/Photoredox Dual Catalysis

2021 ◽  
Author(s):  
Ya Chen ◽  
Junjie Wang ◽  
Yixin Lu
Keyword(s):  
Copper Catalysis ◽  
Photoredox Catalysis ◽  
Dual Catalysis

We disclose herein the first example of merging photoredox catalysis and copper catalysis for radical 1,4-carbocyanations of 1,3-enynes. Alkyl N-hydroxyphthalimide esters are utilized as radical precusors, and the reported mild...

scholarly journals Visible-light-driven spirocyclization of epoxides via dual titanocene and photoredox catalysis

2020 ◽  
Vol 11 (3) ◽  
pp. 839-844 ◽  
Author(s):  
Shuangjie Lin ◽  
Yuqing Chen ◽  
Fusheng Li ◽  
Caizhe Shi ◽  
Lei Shi
Keyword(s):  
Visible Light ◽  
Photoredox Catalysis ◽  
Visible Light Driven ◽  
Dual Catalysis

We describe the synergistic utilization of titanocene/photoredox dual catalysis driven by visible light for radical opening/spirocyclization of easily accessible epoxyalkynes.

Dual copper- and photoredox-catalysed C(sp2)–C(sp3) coupling

2019 ◽  
Vol 55 (29) ◽  
pp. 4238-4241 ◽  
Author(s):  
Euan B. McLean ◽  
Vincent Gauchot ◽  
Sebastian Brunen ◽  
David J. Burns ◽  
Ai-Lan Lee
Keyword(s):  
Visible Light ◽  
Boronic Acids ◽  
Copper Catalysis ◽  
Photoredox Catalysis ◽  
Bond Forming ◽  
Bond Forming Reactions

The use of copper catalysis with visible light photoredox catalysis in a cooperative fashion has recently emerged as a versatile means of developing new C–C bond forming reactions. In this work, dual copper and photoredox catalysis is exploited to effect C(sp2)–C(sp3) cross-couplings between aryl boronic acids and benzyl bromides.

scholarly journals Organic photoredox catalysis for the oxidation of silicates: applications in radical synthesis and dual catalysis

2016 ◽  
Vol 52 (64) ◽  
pp. 9877-9880 ◽  
Author(s):  
Christophe Lévêque ◽  
Ludwig Chenneberg ◽  
Vincent Corcé ◽  
Cyril Ollivier ◽  
Louis Fensterbank
Keyword(s):  
Organic Dye ◽  
Photoredox Catalysis ◽  
Alkyl Radicals ◽  
Metal Free ◽  
Dual Catalysis

Metal free photooxidation of alkyl bis(catecholato)silicates with the organic dye 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyano-benzene (4CzIPN) allows the smooth formation of alkyl radicals.

C-H Bond Functionalization by Dual Catalysis: Merging of High-Valent Cobalt and Photoredox Catalysis

2021 ◽  
Author(s):  
Priyanka Chakraborty ◽  
Rajib Mandal ◽  
Soumen Paira ◽  
Basker Sundararaju
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Low Energy ◽  
The Other ◽  
Photoredox Catalysis ◽  
Metal Catalysis ◽  
Bond Functionalization ◽  
Dual Catalysis ◽  
High Valent ◽  
Energy Pathways

The merger of transition metal catalysis and photocatalysis has emerged as a versatile platform which opened the gateway to diverse low energy pathways for several synthetic transformations. On the other...

Enantioselective Decarboxylative Cyanation Employing Cooperative Photoredox Catalysis and Copper Catalysis

2017 ◽  
Vol 139 (44) ◽  
pp. 15632-15635 ◽  
Author(s):  
Dinghai Wang ◽  
Na Zhu ◽  
Pinhong Chen ◽  
Zhenyang Lin ◽  
Guosheng Liu
Keyword(s):  
Copper Catalysis ◽  
Photoredox Catalysis

Spin-Forbidden Excitation Enables Infrared Photoredox Catalysis

2020 ◽  
Author(s):  
Tomislav Rovis ◽  
Benjamin D. Ravetz ◽  
Nicholas E. S. Tay ◽  
Candice Joe ◽  
Melda Sezen-Edmonds ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Intersystem Crossing ◽  
Photoredox Catalysis ◽  
Infrared Irradiation ◽  
Triplet Excitation ◽  
New Family ◽  
Ir Light

We describe a new family of catalysts that undergo direct ground state singlet to excited state triplet excitation with IR light, leading to photoredox catalysis without the energy waste associated with intersystem crossing. The finding allows a mole scale reaction in batch using infrared irradiation.

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