scholarly journals A Sustainable C-H functionalization of indoles, pyrroles and furans in blue LED with iodonium ylides

2021 ◽  
Author(s):  
Subhabrata Sen ◽  
Saibal Sar ◽  
Ranajit Das ◽  
Dhiraj Barman ◽  
Pikaso Latua ◽  
...  
Keyword(s):  
Indole Derivatives ◽  
Blue Led ◽  
Iodonium Ylides

The pyrrole and indole derivatives are functionalized via a green initiative with dimethylmalonate derived phenyl iodonium ylide 4a in presence of blue LED via C-H functionalization of the respective heterocycles...

scholarly journals Inside Cover: Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes (Angew. Chem. Int. Ed. 47/2019)

2019 ◽  
Vol 58 (47) ◽  
pp. 16700-16700
Author(s):  
Tristan Chidley ◽  
Islam Jameel ◽  
Shafa Rizwan ◽  
Philippe A. Peixoto ◽  
Laurent Pouységu ◽  
...  
Keyword(s):  
Blue Led ◽  
Metal Free ◽  
Iodonium Ylides ◽  
Led Irradiation

scholarly journals Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes

2019 ◽  
Vol 131 (47) ◽  
pp. 17115-17121 ◽  
Author(s):  
Tristan Chidley ◽  
Islam Jameel ◽  
Shafa Rizwan ◽  
Philippe A. Peixoto ◽  
Laurent Pouységu ◽  
...  
Keyword(s):  
Blue Led ◽  
Metal Free ◽  
Iodonium Ylides ◽  
Led Irradiation

scholarly journals Innentitelbild: Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes (Angew. Chem. 47/2019)

2019 ◽  
Vol 131 (47) ◽  
pp. 16854-16854
Author(s):  
Tristan Chidley ◽  
Islam Jameel ◽  
Shafa Rizwan ◽  
Philippe A. Peixoto ◽  
Laurent Pouységu ◽  
...  
Keyword(s):  
Blue Led ◽  
Metal Free ◽  
Iodonium Ylides ◽  
Led Irradiation

scholarly journals Selenocyanation of Indoles Promoted by Visible Light

2020 ◽  
Vol 2 (1) ◽  
pp. 29
Author(s):  
Luana Bettanin ◽  
Filipe Penteado ◽  
Luiz H. Dapper ◽  
Eder J. Lenardão
Keyword(s):  
Visible Light ◽  
Column Chromatography ◽  
Oxidation Reaction ◽  
Eosin Y ◽  
Indole Derivatives ◽  
Reaction Sequence ◽  
Blue Led ◽  
Led Light ◽  
Anticancer Properties ◽  
Intermolecular Cyclization

We developed a promising synthetic methodology for the regioselective photocatalyzed 3-selenocyanation of indoles, employing potassium selenocyanate (KSeCN) and a blue LED light. The 3-selanylindoles have been emerging as a potentially bioactive class of compounds and already have demonstrated anti-inflammatory, antinociceptive and anticancer properties. There are in the literature several methodologies for their preparation; for example, applying intermolecular cyclization with Se-based electrophilic species. Therefore, it is of interest to seek innovative and effective methodologies to selectively access this class of molecules. Furthermore, the photocatalytically formed NCSe· radical can react directly with the N-heterocycle unsaturated substrates, affording the desired compound more effectively than other electrophilic selenium species. In addition, the 3-selenocyanato-1H-indole derivatives can be employed as precursor to obtaining diselenides, through a reduction–oxidation reaction sequence. The new method employs indole as unsaturated N-heterocycle substrate, and 1.3 equiv. of potassium selenocyanate as a selenium source, in the presence of 5.0 mol% of eosin Y, an organic photocatalyst, and 1.0 mL of acetonitrile. The system was stirred and irradiated with a blue LED light for 5 h, and the crude was purified using column chromatography. Thus, as a result, we developed an efficient and smoothly methodology to prepare 3-selenocyanato-1H-indole derivatives, in good yields.

scholarly journals Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes

2019 ◽  
Vol 58 (47) ◽  
pp. 16959-16965 ◽  
Author(s):  
Tristan Chidley ◽  
Islam Jameel ◽  
Shafa Rizwan ◽  
Philippe A. Peixoto ◽  
Laurent Pouységu ◽  
...  
Keyword(s):  
Blue Led ◽  
Metal Free ◽  
Iodonium Ylides ◽  
Led Irradiation

Catalytic enantioselective synthesis of indolizino[8,7-b]indole alkaloid derivatives based on the tandem reaction of tertiary enamides

2021 ◽  
Author(s):  
Xin-Ming Xu ◽  
Ming Xie ◽  
Jiazhu Li ◽  
Mei-Xiang Wang
Keyword(s):  
Indole Alkaloid ◽  
Enantioselective Synthesis ◽  
High Yield ◽  
Tandem Reaction ◽  
Indole Derivatives

An exquisite Pybox/Cu(OTf)2-catalyzed asymmetric tandem reaction of tertiary enamides was developed, which enabled the expeditious synthesis of indolizino[8,7-b]indole derivatives in high yield, excellent enantioselectivity and diastereoselectivity.

Experience in application of red and blue LED light with infra+red component in the ENT disease treatment in children

2018 ◽  
pp. 73-79
Author(s):  
A.L. Kosakovskyi ◽  
◽  
S.O. Gulyar ◽  
I.A. Kosakivska ◽  
N.P. Grushetska ◽  
...  
Keyword(s):  
Disease Treatment ◽  
Blue Led ◽  
Led Light ◽  
Infra Red

ZnO Nano-arrays on High Power Blue LED Chip for Enhanced Light Extraction Efficiency

2012 ◽  
Vol 27 (7) ◽  
pp. 716-720
Author(s):  
Bing XU ◽  
Jun-Liang ZHAO ◽  
Jian-Ming ZHANG ◽  
Xiao-Wei SUN ◽  
Fu-Wei ZHUGE ◽  
...  
Keyword(s):  
High Power ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Blue Led
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