Synergistic combination of visible-light photo-catalytic electron and energy transfer facilitating multicomponent synthesis of β-functionalized α,α-diarylethylamines

2019 ◽  
Vol 55 (45) ◽  
pp. 6405-6408 ◽  
Author(s):  
Yanan Wu ◽  
Yipin Zhang ◽  
Mingjie Jiang ◽  
Xunqing Dong ◽  
Hitesh B. Jalani ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Multicomponent Synthesis ◽  
Transfer Processes ◽  
Synthetic Strategy ◽  
Synergistic Combination

A synthetic strategy which takes advantage of the synergistic combination of electron and energy transfer processes using only one photocatalyst has been developed for the multicomponent synthesis of the α,α-diarylalkylamine skeleton.

scholarly journals Controlling the Optical and Catalytic Properties of Artificial Metalloenzyme Photocatalysts Using Chemogenetic Engineering

2021 ◽  
Author(s):  
Yasmine S. Zubi ◽  
Bingqing Liu ◽  
Yifan Gu ◽  
Dipankar Sahoo ◽  
Jared Lewis
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Catalytic Properties ◽  
Photophysical Properties ◽  
Organic Transformations ◽  
Polypyridyl Complexes ◽  
Transfer Processes ◽  
Pyridine Ligands ◽  
Artificial Metalloenzymes ◽  
Artificial Metalloenzyme

Visible light photocatalysis enables a broad range of organic transformations that proceed via single electron or energy transfer. Metal polypyridyl complexes are among the most commonly employed visible light photocatalysts. The photophysical properties of these complexes have been extensively studied and can be tuned by modifying the substituents on the pyridine ligands. On the other hand, ligand modifications that enable substrate binding to control reaction selectivity remain rare. Given the exquisite control that enzymes exert over electron and energy transfer processes in nature, we envisioned that artificial metalloenzymes (ArMs) created by incorporating Ru(II) polypyridyl complexes into a suitable protein scaffold could provide a means to control photocatalyst properties. This study describes approaches to create covalent and non-covalent ArMs from a variety of Ru(II) polypyridyl cofactors and a prolyl oligopeptidase scaffold. A panel of ArMs with enhanced photophysical properties were engineered, and the nature of the scaffold/cofactor interactions in these systems was investigated. These ArMs provided higher yields and rates than Ru(Bpy)32+ for the reductive cyclization of dienones and the [2+2] photocycloaddition between C-cinnamoyl imidazole and 4-methoxystyrene, suggesting that protein scaffolds could provide a means to improve the efficiency of visible light photocatalysts.

scholarly journals Pyrene-based metal–organic framework NU-1000 photocatalysed atom-transfer radical addition for iodoperfluoroalkylation and (Z)-selective perfluoroalkylation of olefins by visible-light irradiation

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32610-32620 ◽  
Author(s):  
Tiexin Zhang ◽  
Pengfang Wang ◽  
Zirui Gao ◽  
Yang An ◽  
Cheng He ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Framework ◽  
Radical Addition ◽  
Light Irradiation ◽  
Atom Transfer ◽  
Transfer Processes ◽  
Atom Transfer Radical Addition ◽  
Metal Organic

Iodoperfluoroalkylation or (Z)-selective perfluoroalkylation of olefins is mediated through energy transfer processes by using pyrene-based MOF NU-1000 under visible-light irradiation.

Energy transfer processes of working gas in pulse tube

2000 ◽  
Author(s):  
Vincenzo Naso ◽  
Marco Lucentini ◽  
Wei Dong
Keyword(s):  
Energy Transfer ◽  
Pulse Tube ◽  
Transfer Processes

Visible-Light Photosensitized Aryl and Alkyl Decarboxylative Carbon-Heteroatom and Carbon-Carbon Bond Formations

2019 ◽  
Author(s):  
Tuhin Patra ◽  
Satobhisha Mukherjee ◽  
Jiajia Ma ◽  
Felix Strieth-Kalthoff ◽  
Frank Glorius
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Alkyl Radical ◽  
General Strategy ◽  
Alkyl Radicals ◽  
Bond Forming ◽  
Radical Trapping ◽  
Carbon Carbon Bond ◽  
Radical Generation ◽  
Trapping Agent

<sub>A general strategy to access both aryl and alkyl radicals by photosensitized decarboxylation of the corresponding carboxylic acids esters has been developed. An energy transfer mediated homolysis of unsymmetrical sigma-bonds for a concerted fragmentation/decarboxylation process is involved. As a result, an independent aryl/alkyl radical generation step enables a series of key C-X and C-C bond forming reactions by simply changing the radical trapping agent.</sub>

Sign in / Sign up

Export Citation Format

Share Document