Visible-Light-Mediated Eosin Y Photoredox-Catalyzed Vicinal Thioamination of Alkynes: Radical Cascade Annulation Strategy for 2-Substituted-3-sulfenylindoles

2018 ◽  
Vol 2018 (18) ◽  
pp. 2117-2121 ◽  
Author(s):  
Shrikant D. Tambe ◽  
Rajendra S. Rohokale ◽  
Umesh A. Kshirsagar
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Radical Cascade

Eosin Y photoredox catalyzed net redox neutral reaction for regiospecific annulation to 3-sulfonylindoles via anion oxidation of sodium sulfinate salts

2018 ◽  
Vol 16 (4) ◽  
pp. 536-540 ◽  
Author(s):  
Rajendra S. Rohokale ◽  
Shrikant D. Tambe ◽  
Umesh A. Kshirsagar
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Cascade Cyclization ◽  
Neutral Reaction ◽  
Neutral Process ◽  
Radical Cascade

An eosin Y photoredox catalyzed net redox neutral process for 3-sulfonylindoles via the anionic oxidation of sodium sulfinate salts and its radical cascade cyclization with 2-alkynyl-azidoarenes was developed with visible light as a mediator.

Visible-light-induced radical cascade cyclization of pyrazoles bearing a coumarin unit

2020 ◽  
Vol 44 (31) ◽  
pp. 13350-13356
Author(s):  
Amit Kumar Sharma ◽  
Anjali Jaiswal ◽  
Anu Mishra ◽  
Jyoti Tiwari ◽  
Deepali Jaiswal ◽  
...  
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Cascade Cyclization ◽  
Radical Cascade

A visible light facilitated protocol for the synthesis of pyrazoles and their derivatives bearing a coumarin unit in the presence of Eosin Y.

Visible-light-induced radical cascade cyclization of 1-(allyloxy)-2-(1-arylvinyl)benzenes with sulfonyl chlorides for the synthesis of sulfonated benzoxepines

2021 ◽  
Author(s):  
Nengneng Zhou ◽  
Kaimo Kuang ◽  
Meixia Wu ◽  
Sixin Wu ◽  
Ziqin Xia ◽  
...  
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Sulfonyl Chlorides ◽  
Cascade Cyclization ◽  
Radical Cascade

A visible light photocatalyzed cascade sulfonylation/cyclization of 1-(allyloxy)-2-(1-arylvinyl)benzenes with sulfonyl chlorides for the con-struction of sulfonated benzoxepines is developed. In the presence of Eosin Y (2.0 mol%) as a photocatalyst...

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.

Synthesis of Tetracyclic Quinazolinones Using a Visible-Light-Promoted Radical Cascade Approach

2016 ◽  
Vol 81 (16) ◽  
pp. 7276-7281 ◽  
Author(s):  
Yue-Yue Han ◽  
Heng Jiang ◽  
Ruzhi Wang ◽  
Shouyun Yu
Keyword(s):  
Visible Light ◽  
Radical Cascade

Organic Photocatalytic Cyclization of Polyenes: A Visible-Light-Mediated Radical Cascade Approach

2015 ◽  
Vol 21 (42) ◽  
pp. 14723-14727 ◽  
Author(s):  
Zhongbo Yang ◽  
Han Li ◽  
Long Zhang ◽  
Ming-Tian Zhang ◽  
Jin-Pei Cheng ◽  
...  
Keyword(s):  
Visible Light ◽  
Radical Cascade

Visible-light-mediated eosin Y catalyzed aerobic desulfurization of thioamides into amides

2013 ◽  
Vol 37 (12) ◽  
pp. 4119 ◽  
Author(s):  
Arvind K. Yadav ◽  
Vishnu P. Srivastava ◽  
Lal Dhar S. Yadav
Keyword(s):  
Visible Light ◽  
Eosin Y
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