Visible light induced intermolecular [2+2]-cycloaddition reactions of 3-ylideneoxindoles through energy transfer pathway

Tetrahedron ◽  
2012 ◽  
Vol 68 (34) ◽  
pp. 6914-6919 ◽  
Author(s):  
You-Quan Zou ◽  
Shu-Wen Duan ◽  
Xiang-Gao Meng ◽  
Xiao-Qiang Hu ◽  
Shuang Gao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Cycloaddition Reactions ◽  
Energy Transfer Pathway

ChemInform Abstract: Visible Light Induced Intermolecular [2 + 2]-Cycloaddition Reactions of 3-Ylideneoxindoles Through Energy Transfer Pathway.

ChemInform ◽  
2012 ◽  
Vol 43 (51) ◽  
pp. no-no
Author(s):  
You-Quan Zou ◽  
Shu-Wen Duan ◽  
Xiang-Gao Meng ◽  
Xiao-Qiang Hu ◽  
Shuang Gao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Cycloaddition Reactions ◽  
Energy Transfer Pathway

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>

Carbon-Heteroatom Cross-Coupling via an Electronically Excited Nickel (II) Complex

2019 ◽  
Author(s):  
Randolph Escobar ◽  
Jeffrey Johannes
Keyword(s):  
Energy Transfer ◽  
Functional Groups ◽  
Cross Coupling ◽  
Reductive Elimination ◽  
Aryl Halides ◽  
Coupling Reactions ◽  
General Methodology ◽  
Cross Coupling Reactions ◽  
Electronically Excited ◽  
Energy Transfer Pathway

<div>While carbon-heteroatom cross coupling reactions have been extensively studied, many methods are specific and</div><div>limited to a set of substrates or functional groups. Reported here is a method that allows for C-O, C-N and C-S cross coupling reactions under one general methodology. We propose that an energy transfer pathway, in which an iridium photosensitizer produces an excited nickel (II) complex, is responsible for the key reductive elimination step that couples aryl halides to 1° and 2° alcohols, anilines, thiophenols, carbamates and sulfonamides.</div>

A New Cycloaddition Profile for ortho-Quinone Methides: Photoredox-Catalyzed [6+4] Cycloadditions for Synthesis of Benzo[b]cyclopenta[e]oxepines

2022 ◽  
Author(s):  
Kenta Tanaka ◽  
Yosuke Asada ◽  
Yujiro Hoshino
Keyword(s):  
Visible Light ◽  
Cycloaddition Reactions ◽  
Quinone Methides

Visible-light-induced [6+4] cycloaddition reactions of ortho-quinone methides have been developed. The reaction of ortho-quinone methides with pentafulvenes in the presence of a thioxanthylium photoredox catalyst afforded benzo[b]cyclopenta[e]oxepines. The present reaction...

Visible light stimulating dual-wavelength emission and O vacancy involved energy transfer behavior in luminescence for coaxial nanocable arrays

2014 ◽  
Vol 115 (22) ◽  
pp. 224308 ◽  
Author(s):  
Lei Yang ◽  
Jiazhang Dong ◽  
Zhongcheng Jiang ◽  
Anlian Pan ◽  
Xiujuan Zhuang
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Dual Wavelength ◽  
Transfer Behavior ◽  
Wavelength Emission ◽  
O Vacancy

scholarly journals Visible Light-Enabled Paternò-Büchi Reaction via Triplet Energy Transfer for the Synthesis of Oxetanes

2020 ◽  
Author(s):  
Katie Rykaczewski ◽  
Corinna Schindler
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Uv Light ◽  
Cycloaddition Reaction ◽  
High Energy ◽  
Triplet Energy ◽  
Reaction Conditions ◽  
Triplet Energy Transfer

<div> <p>One of the most efficient ways to synthesize oxetanes is the light-enabled [2+2] cycloaddition reaction of carbonyls and alkenes, referred to as the Paternò-Büchi reaction. The reaction conditions for this transformation typically require the use of high energy UV light to excite the carbonyl, limiting the applications, safety, and scalability. We herein report the development of a visible light-mediated Paternò-Büchi reaction protocol that relies on triplet energy transfer from an iridium-based photocatalyst to the carbonyl substrates. This mode of activation is demonstrated for a variety of aryl glyoxylates and negates the need for both, visible light-absorbing carbonyl starting materials or UV light to enable access to a variety of functionalized oxetanes in up to 99% yield.</p> </div> <br>

Synthesis of Naphthocyclobutenes from α-Naphthyl Acrylates by Visible-Light Energy-Transfer Catalysis

2019 ◽  
Vol 21 (11) ◽  
pp. 4365-4369 ◽  
Author(s):  
Theodor Peez ◽  
Veronika Schmalz ◽  
Klaus Harms ◽  
Ulrich Koert
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Light Energy
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