Metal‐Free Visible‐Light Promoted Radical Cyclization to Access Perfluoroalkyl‐Substituted Benzimidazo[2,1‐ a ]isoquinolin‐6(5 H )‐ones and Indolo[2,1‐ a ]isoquinolin‐6(5 H )‐ones

2019 ◽  
Vol 361 (22) ◽  
pp. 5176-5181 ◽  
Author(s):  
Fan‐Lin Zeng ◽  
Kai Sun ◽  
Xiao‐Lan Chen ◽  
Xiao‐Ya Yuan ◽  
Shuai‐Qi He ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Cyclization ◽  
Metal Free

Synthesis of 6-Thiocyanatophenanthridines by Visible-Light- and Air-Promoted Radical Thiocyanation of 2-Isocyanobiphenyls

Synlett ◽  
2017 ◽  
Vol 29 (02) ◽  
pp. 176-180 ◽  
Author(s):  
Manjula Singh ◽  
Arvind Yadav ◽  
Lal Yadav ◽  
R. Singh
Keyword(s):  
Natural Resources ◽  
Visible Light ◽  
Room Temperature ◽  
Atmospheric Oxygen ◽  
Ammonium Thiocyanate ◽  
Radical Cyclization ◽  
Eosin Y ◽  
One Pot ◽  
Metal Free

A convenient, efficient, and metal-free synthesis of 6-thiocyanatophenanthridines by visible-light- and air-mediated, eosin Y-catalyzed, sequential radical cyclization and aromatization of 2-isocyanobiphenyls with ammonium thiocyanate is reported. Advantageously, the protocol utilizes inexpensive, clean, and sustainable natural resources such as visible light and atmospheric oxygen at room temperature in a one-pot procedure.

Metal-Free, Visible-Light-Promoted Decarboxylative Radical Cyclization of Vinyl Azides with N-Acyloxyphthalimides

2018 ◽  
Vol 83 (3) ◽  
pp. 1598-1605 ◽  
Author(s):  
Jun-Cheng Yang ◽  
Jia-Yu Zhang ◽  
Jin-Jiang Zhang ◽  
Xin-Hua Duan ◽  
Li-Na Guo
Keyword(s):  
Visible Light ◽  
Radical Cyclization ◽  
Metal Free ◽  
Vinyl Azides

Metal-free, visible-light-promoted oxidative radical cyclization of N-biarylglycine esters: one-pot construction of phenanthridine-6-carboxylates in water

2019 ◽  
Vol 21 (16) ◽  
pp. 4406-4411 ◽  
Author(s):  
Palani Natarajan ◽  
Deachen Chuskit ◽  
Priya Priya
Keyword(s):  
Visible Light ◽  
Intramolecular Cyclization ◽  
Radical Cyclization ◽  
Cyclization Reaction ◽  
Ambient Conditions ◽  
One Pot ◽  
Light Blue ◽  
Metal Free ◽  
Air Atmosphere ◽  
Oxidative Radical Cyclization

A metal-free, visible-light (blue LED: hν = 425 ± 15 nm) photoredox-catalyzed intramolecular cyclization reaction of N-biarylglycine esters to phenanthridine-6-carboxylates in water under an open air atmosphere at ambient conditions has been developed.

Synthesis of sulfone-functionalized chroman-4-ones and chromans through visible-light-induced cascade radical cyclization under transition-metal-free conditions

2020 ◽  
Vol 22 (7) ◽  
pp. 2270-2278
Author(s):  
Yousheng Mei ◽  
Lulu Zhao ◽  
Qi Liu ◽  
Shuchen Ruan ◽  
Lei Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Radical Cyclization ◽  
Metal Free ◽  
Highly Efficient ◽  
Straightforward Approach

A highly efficient and straightforward approach has been developed for the synthesis of sulfone-functionalized chroman-4-ones and chromans through visible-light-induced cascade radical cyclization.

scholarly journals Visible-light-induced oxidant and metal-free dehydrogenative cascade trifluoromethylation and oxidation of 1,6-enynes with water

2017 ◽  
Vol 8 (9) ◽  
pp. 6633-6644 ◽  
Author(s):  
Sadhan Jana ◽  
Ajay Verma ◽  
Rahul Kadu ◽  
Sangit Kumar
Keyword(s):  
Visible Light ◽  
Radical Cyclization ◽  
Metal Free

Unprecedented light-induced oxidant and metal-free tandem radical cyclization–trifluoromethylation and dehydrogenative oxygenation of 1,6-enynes have been achieved using a photoredox catalyst, CF3SO2Na, and water as the oxygen source.

Visible-Light-Promoted Synthesis of Pyrrolidinone Derivatives via Rose Bengal as a Photoredox Catalyst and Their Photophysical Studies

2021 ◽  
Author(s):  
Arup Dutta ◽  
Mostofa Ataur Rohman ◽  
Ridaphun Nongrum ◽  
Aiborlang Thongni ◽  
Sivaprasad Mitra ◽  
...  
Keyword(s):  
Visible Light ◽  
Rose Bengal ◽  
Radical Cyclization ◽  
Cyclization Reaction ◽  
Photoredox Catalysis ◽  
Blue Led ◽  
Metal Free ◽  
Photophysical Studies ◽  
Reaction Profile ◽  
Led Irradiation

An intramolecular radical cyclization reaction towards the synthesis of pyrrolidinone derivatives via metal free photoredox catalysis under blue LED irradiation has been reported. Synthetic efficiency, green reaction profile, easy isolation...

Photocatalytic intramolecular radical cyclization involved synergistic SET and HAT: synthesis of 3,3-difluoro-γ-lactams

2021 ◽  
Author(s):  
Xiaohui Zhuang ◽  
Xiayue Shi ◽  
Rui Zhu ◽  
Bin Sun ◽  
WeiKe Su ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Cyclization ◽  
Metal Free

A mild and metal-free protocol for visible-light induced intramolecular radical cyclization of N-allyl(propargyl)-2-bromo-2,2-difluoro-N-arylacetamide has been developed.

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.

Metal‐Free and Heterogeneous Photocatalytic Reduction of 4‐Nitroaniline by a Poly(Ethylene Glycol)‐Supported Eosin Dye under Visible‐Light Exposure

ChemCatChem ◽  
2019 ◽  
Vol 11 (14) ◽  
pp. 3307-3317
Author(s):  
Andreea L. Chibac ◽  
Violeta Melinte ◽  
Vlasta Brezová ◽  
Estelle Renard ◽  
Arnaud Brosseau ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Visible Light ◽  
Light Exposure ◽  
Photocatalytic Reduction ◽  
Poly Ethylene Glycol ◽  
Metal Free ◽  
Poly Ethylene
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