Eosin Y catalyzed difunctionalization of styrenes using O2 and CS2: a direct access to 1,3-oxathiolane-2-thiones

2016 ◽  
Vol 18 (15) ◽  
pp. 4240-4244 ◽  
Author(s):  
Arvind K. Yadav ◽  
Lal Dhar S. Yadav
Keyword(s):  
Visible Light ◽  
Regioselective Synthesis ◽  
Direct Access ◽  
Eosin Y ◽  
One Pot

An efficient, one-pot, highly regioselective synthesis of 1,3-oxathiolane-2-thiones from styrenes, CS2, atmospheric O2 and visible light is reported.

scholarly journals Eosin Y-catalyzed visible-light-mediated aerobic oxidative cyclization of N,N-dimethylanilines with maleimides

2015 ◽  
Vol 11 ◽  
pp. 425-430 ◽  
Author(s):  
Zhongwei Liang ◽  
Song Xu ◽  
Wenyan Tian ◽  
Ronghua Zhang
Keyword(s):  
Visible Light ◽  
Oxidative Cyclization ◽  
Eosin Y ◽  
Efficient Synthesis ◽  
One Pot ◽  
Bond Functionalization ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Strategy ◽  
Air Atmosphere

A novel and simple strategy for the efficient synthesis of the corresponding tetrahydroquinolines from N,N-dimethylanilines and maleimides using visible light in an air atmosphere in the presence of Eosin Y as a photocatalyst has been developed. The metal-free protocol involves aerobic oxidative cyclization via sp3 C–H bond functionalization process to afford good yields in a one-pot procedure under mild conditions.

scholarly journals Eosin Y Catalyzed Visible-light-promoted One –Pot Facile Synthesis of 1,3,4- Thiadiazole

2015 ◽  
Vol 88 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Vishal Srivastava ◽  
Pravin K. Singh ◽  
Praveen P. Singh
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Facile Synthesis ◽  
One Pot

ChemInform Abstract: Eosin Y Catalyzed Visible-Light-Promoted One-Pot Facile Synthesis of 1,3,4- Thiadiazole.

ChemInform ◽  
2015 ◽  
Vol 46 (44) ◽  
pp. no-no
Author(s):  
Vishal Srivastava ◽  
Pravin K. Singh ◽  
Praveen P. Singh
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Facile Synthesis ◽  
One Pot

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.

Organophotoredox Catalysis: Visible-light-induced Multicomponent Synthesis of Chromeno[4, 3-b]chromene and Hexahydro-1H-xanthene Derivatives

2019 ◽  
Vol 6 (3) ◽  
pp. 222-230 ◽  
Author(s):  
Amit K. Sharma ◽  
Jyoti Tiwari ◽  
Deepali Jaiswal ◽  
Shailesh Singh ◽  
Jaya Singh ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Dyes ◽  
Oxidative Cyclization ◽  
Eosin Y ◽  
Organic Substrates ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Xanthene Derivatives ◽  
Powerful Approach ◽  
Work Up

Background:In recent years, photoredox catalysis using eosin Y has gained considerable significance in organic chemistry. It is evolving as a powerful approach in modern organic synthesis for the activation of small molecules.Objective:The use of organic dyes to convert visible light into chemical energy by involving a single-electron transfer with organic substrates has innumerable applications.Method and Results:The present strategy is the first example of visible light promoted, aerobic, oxidative cyclization of chromeno[4,3-b]chromenes and hexahydro-1H-xanthenes via the formation of C–O and C–C bonds to afford excellent yield of the products in a simple one-pot operation under mild reaction conditions.Conclusion:The major advantages of the present methodology include short reaction time, cost effectiveness, easy work-up, broad substrate scope and high atom economy.

Eosin Y-catalyzed one-pot synthesis of spiro[4H-pyran-oxindole] under visible light irradiation

Tetrahedron ◽  
2020 ◽  
Vol 76 (14) ◽  
pp. 131059 ◽  
Author(s):  
Meng-Nan Chen ◽  
Jia-Qi Di ◽  
Jiao-Mian Li ◽  
Li-Ping Mo ◽  
Zhan-Hui Zhang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Eosin Y ◽  
One Pot ◽  
One Pot Synthesis

Rhodamines as Photocatalyst in Organic Synthesis

2020 ◽  
Vol 07 ◽  
Author(s):  
Avik K. Bagdi ◽  
Papiya Sikdar
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes ◽  
Transition Metal Catalysts ◽  
Visible Light Photocatalysis ◽  
Eosin Y ◽  
Organic Transformations ◽  
The Sustainable Development ◽  
Mechanistic Pathway ◽  
Green Model

Abstract:: Organic synthesis under environment friendly conditions has great impact in the sustainable development. In this context, visible light photocatalysis has emerged as a green model as this offers an energy-efficient pathway towards the organic transformation. Different transition-metal catalysts (Ir-, Ru-, Cu- etc) and organic dyes (eosin Y, rose bengal, methylene blue etc) are well-known photocatalysts in organic synthesis. Apart from the well-known organophotoredox catalysts, rhodamines (Rhodamine B and Rhodamine 6G) have been also employed as efficient photocatalysts for different organic transformations. In this review, we will focus on the photocatalysis by rhodamines in organic synthesis. Mechanistic pathway of the methodologies will also be discussed. We believe this review will stimulate the employment of rhodamines in the visible light photocatalysis for efficient organic transformations in the future.

Highly chemoselective deoxygenation of N-heterocyclic N-oxides under transition metal-free conditions

2021 ◽  
Vol 19 (16) ◽  
pp. 3735-3742
Author(s):  
Se Hyun Kim ◽  
Ju Hyeon An ◽  
Jun Hee Lee
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Eosin Y ◽  
Metal Free ◽  
Simple Protocol

Here, we provide an operationally simple protocol for the highly chemoselective deoxygenation of various functionalized N-heterocyclic N-oxides under visible light-mediated photoredox conditions with Na2-eosin Y as an organophotocatalyst.

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