Visible-Light Carbon Nitride-Catalyzed Aerobic Cyclization of Thiobenzanilides under Ambient Air Conditions

Organic Letters, Journal Year: 2021, Volume and Issue: 23(12), P. 4843 - 4848

Published: June 2, 2021

A metal-free heterogeneous photocatalysis has been developed for the synthesis of benzothiazoles via intramolecular C–H functionalization/C–S bond formation thiobenzanilides by inexpensive graphitic carbon nitride (g-C3N4) under visible-light irradiation. This reaction provides access to a broad range 2-substituted in high yields an air atmosphere at room temperature without addition strong base or organic oxidizing reagents. In addition, catalyst was found be stable and reusable after five cycles.

Language: Английский

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A visible-light photoredox-catalyzed four-component reaction for the construction of sulfone-containing quinoxalin-2(1H)-ones

Organic Chemistry Frontiers, Journal Year: 2021, Volume and Issue: 8(19), P. 5403 - 5409

Published: Jan. 1, 2021

A visible-light photoredox-catalyzed four component reaction of quinoxalin-2(1 H )-ones, alkenes, aryldiazonium, and sodium metabisulfite leading to sulfone-containing )-ones has been developed.

Language: Английский

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Metal‐Free Visible‐light Mediated C−S Bond Formation

Asian Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 12(8)

Published: June 26, 2023

Abstract The upsurge in interest the development of methodologies for synthesis sulfur‐containing compounds via use visible‐light has been established as a sustainable tool organic chemistry. Particularly, mediated C−S bond formation gained popularity due to its operational simplicity, minimized by‐products, easy handling, mild reaction conditions, etc. Photochemistry not only provides way synthesize complex molecules but also ability overcome many challenges which are difficult attain by conventional thermal pathways. Owing biological importance compounds, present review focused on under metal‐free conditions visible‐light. objective current is bring out unearthing collection regarding photoredox catalysis. For better understanding, categorized according mode reactions viz , difunctionalization alkenes and alkynes, C−H functionalization, radical cyclization. All each sections described with selected examples proper explanation proposed mechanism.

Language: Английский

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Heterogeneous Photocatalytic C–H Functionalization of Indoles with Diazo Compounds Enabled by Carbon Nitride

The Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 88(13), P. 8703 - 8708

Published: May 29, 2023

Herein, we reported the heterogeneous photocatalytic C–H alkylation of indoles with diazo compounds using graphitic carbon nitride (g-C3N4) as photocatalyst. The reaction was carried out under a simple operation and mild conditions. In addition, catalyst found to be stable reusable after five cycles. photochemical proceeds via an intermediary radical, which is generated from through visible-light-promoted proton-coupled electron transfer (PCET) process.

Language: Английский

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Copper-catalyzed regio- and chemoselective selenosulfonylation of 1,6-enynes from sulfur dioxide

Organic Chemistry Frontiers, Journal Year: 2021, Volume and Issue: 8(21), P. 6119 - 6124

Published: Jan. 1, 2021

An efficient copper-catalyzed multicomponent reaction of 1,6-enynes, diselenides, DABCO·(SO 2 ) , and cycloketone oxime esters was achieved, providing cyanoalkylsulfonated pyrrolidines in moderate to good yields.

Language: Английский

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