Molecular Design of Donor-Acceptor-Type Organic Photocatalysts for Metal-free Aromatic C−C Bond Formations under Visible Light

2018 ◽  
Vol 360 (22) ◽  
pp. 4312-4318 ◽  
Author(s):  
Lei Wang ◽  
Jeehye Byun ◽  
Run Li ◽  
Wei Huang ◽  
Kai A. I. Zhang
Keyword(s):  
Visible Light ◽  
Molecular Design ◽  
Metal Free ◽  
Donor Acceptor

scholarly journals Metal-Free C-Se Cross-Coupling Enabled by Photoinduced Intermolecular Charge Transfer

2021 ◽  
Author(s):  
Chen Zhu ◽  
Serik Zhumagazy ◽  
Huifeng Yue ◽  
Magnus Rueping
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Electron Donor ◽  
Cross Coupling ◽  
Metal Free ◽  
Intermolecular Charge Transfer ◽  
Donor Acceptor

Metal-free C-Se cross-couplings via the formation of electron-donor-acceptor (EDA) complexes have been developed. The visible-light induced reactions can be applied for the synthesis of a series of unsymmetrical diaryl selenides...

Visible light mediated, metal-free carbene transfer reactions of diazoalkanes with propargylic alcohols

2019 ◽  
Vol 55 (33) ◽  
pp. 4881-4884 ◽  
Author(s):  
Feifei He ◽  
Rene M. Koenigs
Keyword(s):  
Visible Light ◽  
Transfer Reactions ◽  
High Yield ◽  
Propargylic Alcohols ◽  
Metal Free ◽  
Sterically Demanding ◽  
Donor Acceptor ◽  
Carbene Transfer

The photolysis of donor–acceptor diazoalkanes in the presence of propargylic alcohols furnishes valuable, sterically demanding tetra-substituted cyclopropenes in high yield under metal-free conditions.

Expanding the donor–acceptor toolbox with a minimal 5-(thiophen-2-yl)-1,3-thiazole core: transition metal-free synthesis and molecular design for HOMO–LUMO energy modulations

2016 ◽  
Vol 40 (4) ◽  
pp. 3036-3039 ◽  
Author(s):  
Rakesh Radhakrishnan ◽  
Kumaran G. Sreejalekshmi
Keyword(s):  
Transition Metal ◽  
Molecular Design ◽  
Lumo Energy ◽  
Metal Free ◽  
Donor Acceptor ◽  
Homo Lumo

D–A–D–A tetrads based on a minimal thienylthiazole core are synthesized and HOMO–LUMO energy modulations in designer systems by varying terminal D/A groups demonstrated.

A Metal‐Free Donor–Acceptor Covalent Organic Framework Photocatalyst for Visible‐Light‐Driven Reduction of CO 2 with H 2 O

ChemSusChem ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1725-1729 ◽  
Author(s):  
Kai Lei ◽  
Di Wang ◽  
Liqun Ye ◽  
Mingpu Kou ◽  
Yu Deng ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Free ◽  
Covalent Organic Framework ◽  
Visible Light Driven ◽  
Donor Acceptor ◽  
Organic Framework

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

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.

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